PLAY → UNDERSTAND → MAKE SOMETHING NEW

Browser games and ports.
Bigger possibilities.

Real games. Real source links. A clear line between free to play, open code and content you can reuse.

Explore 19 browser-game projects, including the Zork trilogy. The separate NFS fan-port reference has commercial-content restrictions. These games open on external sites; this page does not host their game files.

Original game workshop Three new source discoveries Four new input checks Four earlier starting points Eight more ports Commercial-content reference

A working link is not a gameplay test.

Recorded input responses were checked in Net, Zork I, Anarch, The Powder Toy and Vulture NetHack. Each card states the exact interaction. Zork II and III were not played, and other entries show title-screen, launcher or documentation evidence. No full game completion, complete source build, phone testing or security certification is claimed.

Some 3D ports could not run in the test browser because GPU features were unavailable; that does not establish a failure on your device. External hosts have their own privacy, download and storage practices. No external page or game loads until you follow a link.

Earlier entries checked 7 November; three new source discoveries checked 8 November 2026. Availability and terms can change. Keep original saves, and review the destination before loading your own files.

PLAY · CHANGE A MAP · KEEP YOUR COPY

Try an original game. Make one change.

Separate from the external-port collection below: an experimental Free4AllHub workshop with complete editable source.

Tactical rescue · single player · original game workshop

Embergrid Foundry — Experimental Workshop

Experimental workshop · browser gameplay unverified

Play six tactical rescue missions, change a map and keep a credited copy. The experimental hosted workshop includes a mission editor, completed-mission checkpoints, complete playable HTML and editable source.

Open experimental workshop Download complete workshop HTML Editable workshop source ZIP

Play: Open the workshop and choose Start mission. Use arrows or WASD to move, Space for a charge and Escape to pause.
Change a map: Open Remix this mission, choose Floor and remove one crate. Change the title, then choose Review & play draft.
Keep the map: In the editor, choose Prepare credited JSON, then use the outer file panel to download the level-pack JSON. It captures the current draft mission and credit. Keep the original source and credits.
Keep progress separately: Choose Prepare campaign checkpoint, then download the checkpoint from the outer file panel. It keeps the campaign pack and completed mission results, not a live attempt or editor drafts.
Reopen and check: In a fresh workshop tab, select Level pack or Campaign checkpoint to match your file, choose the saved JSON and select Review import in game. Review any replacement decision, then start explicitly. Verify both your map and checkpoint before sharing; clicking download alone is not proof of a saved file.

No automatic saves. Keep map and checkpoint files separately. Neither saves live positions, health, enemies or fuses. A checkpoint resumes at a mission boundary.

File controls: The workshop separates an opaque allow-scripts game sandbox from explicit outer-page local JSON download and import controls. This describes the implementation, not independently verified browser isolation. This Hub page only links out; it does not load or embed the game.

Code and assets: Original code and procedural assets by Free4AllHub contributors, under MIT. Preserve the embedded LICENSE and original credits in copies and remixes. No independent security certification is claimed.

What was checked: The hosted workshop release and source identity were recorded. Exact v121 host/game bundles completed all six missions and checkpoint continuation in Node simulations with simulated DOM, input and file controls. Edited-map round trips and interrupted imports were also checked. These are non-browser tests, not a human playthrough or proof of native file saving.

Limits: Real-browser gameplay, rendering, audio, sandbox enforcement, native file download/reopen, local-file behavior, accessibility and mobile behavior remain unverified. Known arbitrary input-cadence differences remain. Checkpoints retain the campaign pack and completed mission results, not mid-mission state or editor drafts.

Controls, source and original contribution history

Arrow keys or WASD to move; Space to place a charge; Escape to pause. Rescue every worker, then reach the exit. Touch controls exist but device behavior is unverified.

Inspect downloaded HTML before opening it. The workshop HTML is self-contained; the editable source ZIP includes modules, tests, credits and rebuild instructions. Local-file opening and native downloads have not been browser-qualified. Exporting a map does not publish it.

Original contribution and history Original contributed HTML · v1

Original contribution only: its repository embedded preview blocks downloads and confirmation dialogs. Use the original version-1 HTML download for that edition. The separate workshop uses explicit outer-page file controls; their native browser behavior remains unverified.

Original contribution only: version 1, 125682 bytes; SHA-256 0c2ca774353f6315f312dde2ef9888f86fba64b9ac5f7e8caf710b4995b1a211. This hash identifies the original contributed HTML, not the current hosted workshop or its source ZIP.

Three new source discoveries

A cozy bee game, a browser FPS and a multiplayer strategy game. Code and asset terms were checked separately. None has a qualified gameplay session in this review.

Cozy 3D bee exploration and hive building

Hivebound

Source reviewed; cloud WebGL launch failed

Gather nectar, explore an island and build a hive. The upstream project documents a free browser game, local saves and a static build suitable for a small remix.

Visit official game · WebGL test blocked

Code: MIT for project code; dependency licences remain separate

Content and reuse: The project README says models and audio are generated in code, with no game asset files. Its MIT licence permits adaptation with the copyright and permission notice retained. Dependencies and any externally loaded fonts still need their own notices; this is not a complete dependency audit.

Requires WebGL. Browser and device compatibility remain unqualified.

What was checked: On 8 November 2026 the official page opened, then rendered a Nuxt 500 error with “THREE.WebGLRenderer: Error creating WebGL context.” No gameplay, controls or save/reopen path was observed. This browser-specific failure does not establish that the public host is down or that it fails on other devices.

Source, remix starting point & limits

Start small: After testing an unchanged build, make one new Queen request or one island landmark using the existing procedural graphics. Keep the MIT notice and verify save compatibility.

Technology: Nuxt 4, TresJS, three.js and Pinia; Node.js 22; static output from npm run generate.

README documents npm install, npm run typecheck and npm run generate; the static output is .output/public. No installation or build was run during this research.

Source documents keyboard, mouse and touch controls, accessibility settings, browser-local saves and offline installation; none were hands-on verified. The README says the official host sends anonymous PostHog events; its README says forks/local previews send none. Verify the telemetry guard and all runtime requests before self-hosting.

Upstream source and licence files were reviewed on 8 November 2026. No source build or exact source/live-build correspondence has been verified.

Port / engine source Licence evidence Controls, static build, saves and privacy notes

First-person shooter with bots and multiplayer

Riposte: Frontline

Official page and source reviewed; gameplay untested

A free browser FPS with a published source snapshot. Use the official game link first: source-code freedom does not cover every bundled asset.

Visit official game · gameplay untested

Code: MIT game code, with explicit exceptions in NOTICE.md

Content and reuse: A copy or remix must use another name and logo. Suno free-plan music is non-commercial; Mixamo animation redistribution has separate terms; the Flashkit hit sample needs its author’s terms checked. Sounds retain per-file CC0/CC BY or other notices; textures and skies are described as CC0. Replace or verify each excluded asset before hosting or remixing. Do not present the whole bundle as MIT.

Contains shooting and combat. The official host has accounts and multiplayer features with its own privacy terms.

What was checked: On 8 November 2026 an official-page text fetch returned the game menus, solo/multiplayer options and source link. The repository README and actual LICENSE/NOTICE files were read. No interactive runtime or controlled gameplay was tested.

Source, remix starting point & limits

Start small: Start with an original-name, solo bot-training map after replacing excluded branding, audio and animation assets. Keep MIT and per-file attribution notices.

Technology: three.js and JavaScript assembled by Python 3; source includes a prebuilt dist folder and separate texture/sound folders.

README identifies the published source snapshot as version 5.6.0. This does not identify the current live-game version.

README documents python3 build.py and opening dist/riposte-frontline.html with dist/tex and dist/sfx beside it. No build was run.

Repository is a 5.6.0 snapshot, not every live release. Official accounts, progress, leaderboards, friends, moderation and lobby servers are absent from the source. The source documents solo and browser-to-browser PeerJS play; neither was tested. Linking is the immediate route; do not mirror bundled assets without resolving exclusions.

Upstream source and licence files were reviewed on 8 November 2026. No source build or exact source/live-build correspondence has been verified.

Port / engine source Licence evidence Licence evidence 2 Source snapshot, build and missing server features

Persistent multiplayer village strategy

LibreHold

Source reviewed; browser inspection timed out

Develop a village, raise an army and compete in short or persistent worlds. The project documents free guest instant games; a self-hosted copy needs a real server.

Visit official game · gameplay unverified

Code: AGPL-3.0-only code with attribution, origin and trademark terms

Content and reuse: Artwork is not open-licensed. It may stay unchanged with LibreHold or a modified version on a non-commercial server: no paid access, paid in-game items or advertising. Distribute artwork only together with that game’s source. Do not reuse it in unrelated projects or alter it. Modified games need their own name/logo/domain, retained credits, an explicit modified-origin statement beside the author notice and the required source offer. Fonts are separately licensed. Do not label the complete game AGPL-only.

Contains strategic warfare. External multiplayer host has its own account, storage and privacy practices.

What was checked: On 8 November 2026 the official URL opened a browser tab titled “LibreHold — pixel-art village wars in your browser”, but page inspection timed out twice. The README and actual code, additional-terms and artwork licence files were read. No usable game screen, guest match, controls or persistence was tested.

Source, remix starting point & limits

Start small: Link to the official game first. For a later authorised private server, change a bot or balance rule, retain legal notices and publish modified source when serving users over a network. Replace artwork for uses outside its narrow permission.

Technology: Go server, React client, PostgreSQL, optional production Valkey/Caddy and Docker Compose.

Upstream labels the project alpha; no immutable source revision or live release was pinned.

README documents a minimal Docker Compose server and separate production deployment guidance. No containers, server or accounts were created.

This is an alpha: the README warns that worlds and accounts may reset. Guest one-hour games and phone layouts are upstream claims, not tested outcomes. Hosting requires Go, PostgreSQL and, for the production setup, Valkey; a static copy cannot run the full game. A new public server would add hosting/operational and player-data responsibilities and is not part of this listing.

Upstream source and licence files were reviewed on 8 November 2026. No source build or exact source/live-build correspondence has been verified.

Port / engine source Licence evidence Licence evidence 2 Licence evidence 3 Guest play, alpha warning and server requirements

New: meaningful input checked

Four new project groups with recorded command, movement or simulation responses. This is a bounded desktop check, not a full-game, save or every-device guarantee.

Text adventure / interactive fiction

Zork I, II and III

Zork I command checked; II and III untested

Explore three classic text adventures, now released under MIT. A mailbox command was checked in Zork I; the other two stories have documented browser links.

Open Zork I · command checked Open Zork II · gameplay untested Open Zork III · gameplay untested

Code: MIT for each released Zork source repository and MIT for the wasmga.me interpreter/wrappers.

Content and reuse: Story/world text contained in the licensed titles' source is covered. Runtime uses Inter/Noto Sans SC glyphs under SIL OFL 1.1. Microsoft's grant excludes commercial packaging, marketing art and trademark/brand rights. Do not extend these licences to the separate historicalsource/zork mainframe archive or other Infocom titles. Keep both Microsoft and interpreter copyright/licence notices.

What was checked: Rendered Zork I release 119 / serial 880429 at West of House. Entering 'open mailbox' produced 'Opening the small mailbox reveals a leaflet.' and Moves:1. A preliminary single-letter input received parser feedback. Zork II and III links were observed and licences individually read, but their gameplay was not tested. Save persistence was not tested.

Source, remix starting point & limits

Start small: Try one change: New rooms, objects and parser puzzles; Accessible larger-type or simplified-command frontend; Educational story-code walkthroughs.

Technology: ZIL stories; Rust interpreter and wrappers

Microsoft documents ZILF compiling zork1.zil followed by zapf producing .z3. wasmga.me/games README documents sh build.sh; Rust needs cargo and wasm32-unknown-unknown target. Cargo.lock pins wasmgame-wg runtime. cargo test in zmachine exercises all three opening sequences.

No purchase or personal game files needed. Browser bundles a licensed story file; source is available for rebuilding or changing it.

Browser Sources panel links MIT game module to wasmga-me/games/tree/main/zork1 and exact story commit 97b7b3d68c075dd9af7da499c3e9690ada3471fd. Panel-to-source binding checked, not independently rebuilt or byte-matched.

Port / engine source Official Nov 20 2025 MIT grant and exclusions; ZILF commands MIT licence read MIT licence read MIT licence read Build toolchain, interpreter tests, font/story rights Unmodified release119 story inclusion Zork I story revision Zork II story revision Zork III story revision

Retro first-person shooter

Anarch

Level movement and turning checked

An original retro first-person shooter with ten documented levels and CC0 code, art and sound. The official browser build responded to movement and turning.

Open external browser game

Code: CC0 1.0 plus author waiver

Content and reuse: Author explicitly identifies all code, graphics, sprites, palette, fonts, sound, music, story and text as original and CC0. szymor/anarch is an additional port/fork inspected for readable source and build scripts, not proof that every current official deployed byte matches that fork. Optional Freedoom-asset mod is a separate repository with different asset terms. Author's noncommercial philosophy is not a noncommercial licence restriction; the actual CC0 grant permits commercial reuse.

Contains shooting/combat and an anticapitalist robot-uprising story. The upstream site and documentation include profanity; no family-friendly review is claimed.

What was checked: Official 1.02 CC0 menu and intro rendered. After starting level 1, first-person environment and health100 HUD rendered; Up input moved the view and Right input visibly changed orientation/location. Full combat/level completion not tested. Save persistence was not tested.

Source, remix starting point & limits

Start small: Try one change: New ten-level campaign; Replace robot visuals and music; Simplified controls/accessibility or teaching raycasting.

Technology: C99, SDL2 frontend compiled with Emscripten

make.sh emscripten invokes emcc main_sdl.c with SDL2, HTMLshell.html, exported _main/_webButton/_webSetTouchControls and ccall/cwrap. Assets are in images.h, levels.h and sounds.h; settings in settings.h. Source includes level-generation/editor-related tooling and mods.

Complete standalone original game; no Doom or Wolfenstein files.

Source references and any named revisions were reviewed, but no build or served-runtime byte comparison was performed.

Port / engine source Creator's exact play/source links, scope and CC0 art declaration Canonical project responds Detailed licence, architecture and asset statements Emscripten build command Keyboard/control bindings

Physics sandbox / construction

The Powder Toy

Sand drawing and falling checked

Draw materials, build machines and experiment with heat, gravity and reactions. Sand drawing and falling were observed in the browser port.

Open external browser game

Code: GPL-3.0-or-later per runtime/source notices; GPL3 licence read

Content and reuse: Core simulation/assets ship with the open project; dependencies and fonts retain their own notices. No proprietary retail content needed. Do not assume every community-uploaded save or Lua script inherits the engine licence. Preserve notices for included SDL/Lua/fonts and other libraries. Host's website wrapper/ads/account features are separate from the engine source.

What was checked: The browser loaded The Powder Toy 100.1.401, a WASM32-EMSCRIPTEN NOHTTP build. Selecting SAND and dragging in the drawing area created visible particles that fell through the canvas. The source panel exposed an upstream commit and patches. Save controls were present; persistence and export/import were not tested.

Source, remix starting point & limits

Start small: Try one change: New material reactions; Guided physics/electronics challenges; Beginner-friendly tool palette and presets.

Technology: C++, SDL2, Meson, Emscripten

Upstream .github/build.sh and .github/emscripten-ghactions.ini support browser build. Host adds snapshot/restore, clears/pauses through wrapper, disables online server features and makes open/save local.

This hosted NOHTTP build omits official community save browser, ratings, tags and sign-in. Browser local data can be cleared; export/backup should be tested before promising persistence. No chemistry safety or educational accuracy review implied. No external game files or paid data.

The browser source panel identifies upstream commit 3c639589be64682b4b1ee78a62fe28b5baf3af9f. Patch read; build script exact link verified but search cannot fetch application/x-sh. No clone/build verification.

Port / engine source Core gameplay, Lua API, dependencies GPL3 terms Upstream Emscripten build Hosted modifications/licence/version Actual integration patch Named upstream source revision Host build script

Isometric roguelike

Vulture NetHack 3.6.6

Dungeon movement checked; asset audit incomplete

Explore NetHack 3.6.6 through an isometric interface. Dungeon movement worked; reliable saves and inherited artwork rights need further review.

Open external browser game

Code: NetHack General Public License (NGPL), not GNU GPL

Content and reuse: Graphics, sounds, music and fonts bundled, but no current per-asset provenance/licence inventory found. NGPL requires preserved notices, prominent dated change notices and source provision; its source-location-only alternative is limited to noncommercial distribution. Historical Vulture developer report documented problematic contributed Absurd-derived tiles and their replacement. This does not prove this fork contains problematic art, but prevents an all-assets-cleared claim. Audit or replace inherited artwork before publishing an art remix.

Contains fantasy combat. Audit or replace inherited artwork before publishing an art remix; browser save persistence is unverified.

What was checked: A default fictional player and random character were created, the intro advanced to an isometric dungeon, and a tile click followed by h input visibly changed player/pet positions. The title identified NetHack 3.6.6, built 8 February 2026. Save persistence was not tested or established; do not assume a save survives refresh.

Source, remix starting point & limits

Start small: Try one change: Modernized point-and-click interface; Larger text/tutorial overlays; New mechanics with independently licensed replacement artwork.

Technology: C/C++, SDL2, Emscripten

Perform native build first to generate NetHack sources/data; then sys/emscripten/build-web.sh. Serve build-web with supplied Node server. Scripts rebuild architecture-sensitive level/dungeon/quest data for WASM.

Older NetHack version, not latest. Visible resolution control showed 300x150 while larger game UI rendered; do not claim all layout/control settings correct. Mobile and reliable saves require further testing. Deployed build includes its data and needs no purchased NetHack or Steam data.

Reviewed source main commit c7d1cd3119ebf1319a3e3d142ff93643d1325a38. This does not establish deployed-byte correspondence. gh-pages contains ~90.19 MB data,6.58 MB WASM,0.62 MB JS before transfer compression; not measured network transfer.

Port / engine source Exact deployment and build instructions NGPL terms WASM build and persistence caution UI shell/save support inspection Historical developer provenance concern, not proof about current fork

Four useful starting points

A puzzle collection, a 3D skill game, an action RPG and free-content FPS campaigns. Different evidence levels are shown on every card.

40 single-player logic/puzzle games ported from C

Simon Tatham's Portable Puzzle Collection

Net interaction checked

40 single-player logic puzzles with MIT-licensed source. Start with the checked Net interaction, then explore the collection.

Open external browser game Open Net, the checked puzzle

Code: MIT

Content and reuse: Official collection is under MIT; procedural puzzle graphics require no commercial game asset pack. Retain authorship/copyright and license notice.

What was checked: Net loaded a generated 5x5 board. A tile click changed the rendered board and enabled Undo; using Undo toggled Undo/Redo states and board status. No full puzzle completion claimed.

Source, remix starting point & limits

Start small: Use existing puzzle backend for reskinning and UX, or developer interfaces to add new puzzle types/frontends.

Technology: C backends compiled to JavaScript/WebAssembly with shared frontends.

Official docs identify 20260923.616da16.

Only Net was interactively tested, not all 40 games.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Creator guide Licence evidence

3D rolling-ball skill/puzzle

Neverball

Official launcher checked; gameplay unverified

Tilt a 3D world to roll a ball through obstacle courses. Custom levels and themes provide a useful first remix.

Open external browser game

Code: GPL-2.0-or-later with documented component exceptions

Content and reuse: License notes third-party fonts, Octocat design used under specific GitHub permission, MIT miniz, GPLv3 easings, and libjpeg-derived source. Do not relabel everything GPLv2-only or imply unlimited trademark/Octocat reuse.

What was checked: Official launch page and source ZIP link observed. Play Now loaded runtime/base-neverball.zip; log ended with EGL_BAD_MATCH window/context creation failure, leaving blank canvas. No controlled gameplay.

Source, remix starting point & limits

Start small: Custom level sets and GUI themes; launcher accepts ZIP/PK3 addons and replay files. Preserve per-component notices.

Technology: Official Emscripten/gl4es browser port; emscripten and js directories present upstream.

Official homepage announces browser version on September 8, 2026.

Host advertises corresponding source ZIP, but archive not unpacked and byte match not verified.

Browser failure attributable to observed EGL context limitation; do not claim the public host is down. Official mapping docs say some content is outdated.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Project evidence Creator guide Licence evidence

Full single-player 2D action RPG

Flare: Empyrean Campaign

Official launch page checked; gameplay unverified

A single-player 2D action RPG. The official browser build is v1.14 with a 127 MB initial load.

Open external browser game

Code: Engine GPL-3.0-or-later; game art/data CC-BY-SA-3.0-or-later

Content and reuse: Game repository explicitly grants CC-BY-SA 3.0 or later for art/data, with SIL OFL fonts. Engine default mod and other font exceptions documented separately.

Contains violence, blood and mild gore.

What was checked: Official page loaded the Emscripten game iframe, which later displayed crashed-frame icon. No gameplay observed.

Source, remix starting point & limits

Start small: Edit INI-style stats, quests and item data; use Tiled for maps. Game repository includes art_src Blender sources and tiled source maps.

Technology: C++ and SDL2/image/mixer/ttf compiled with Emscripten. Build script preloads separate flare-game mods.

Official browser is v1.14 and initially loads 127 MB. Current official downloads page says desktop v1.15 exceeds itch web size limit. Do not label browser build v1.15.

No build performed. First-pass improvement should be a small quest/map/data remix rather than renderer rewrite. Contains violence, blood and mild gore.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Game content source Project evidence Build instructions Licence evidence Licence evidence 2

Full free-content FPS in a Doom-compatible browser engine

Freedoom Phases 1 and 2 via wasmdoom

Earlier title screen observed; availability unverified

Free-content FPS campaigns in a community-maintained Doom-compatible browser engine. Direct-link availability is currently unverified.

Try documented Phase 1 link Phase 2 · availability unverified

Code: Browser engine repository GPLv2; Freedoom content BSD-3-Clause

Content and reuse: Select Freedoom WADs for remix. Repository also contains Doom shareware doom1.wad, whose existence does not place id Software content under GPL. Do not republish/relicense that WAD as freely remixable content.

Contains combat or violence. Check the destination’s content before playing.

What was checked: Phase 1 displayed Freedoom v0.13.0 title screen in cloud Chromium. Subsequent UI-control calls timed out. No controlled movement/combat or completed level claimed. The documented direct links later returned HTTP 404 to a text fetch; current browser availability was not reverified.

Source, remix starting point & limits

Start small: Start with Freedoom WADs, UI overlays, accessibility, level/weapon variants, or documented game-event and state snapshot/apply interfaces.

Technology: Freestanding wasm32 C engine and separate OPL3 music WASM; Zig/Clang toolchain, TypeScript/Vite frontend. Not Emscripten.

README documents mise install, mise run wasm, mise run web:dev, mise run check, pinned toolchain files, headless scripted simulations and tests.

Only Phase 1 opened; Phase 2 exact URL verified in maintainer README. Single-player only.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Game content source Licence evidence Licence evidence 2

Eight more ports to investigate

Substantial browser projects with source links. These are conditional discovery leads, not gameplay-tested or fully audited remix kits.

Traditional roguelike with procedural dungeon exploration

Brogue Community Edition browser fork

Launcher observed; gameplay unverified

A traditional roguelike with procedural dungeon exploration, in a browser adaptation of Brogue CE 1.15.1.

Open external browser game

Code: AGPL-3.0 for code; CC-BY-SA-4.0 for included tiles.png

Content and reuse: Included CE tile graphics license is explicit. Do not assume Oryx's separate expanded commercial tileset is included in that grant.

Contains combat or violence. Check the destination’s content before playing.

What was checked: Page title reported BrogueCE v1.15.1-js with file manager and game-canvas. Screenshot/state calls later timed out before gameplay could be observed. Older freethenation/broguejs also loaded shell but follow-up timed out.

Source, remix starting point & limits

Start small: Dungeon rules, monsters, procedural generation and rendering. Preserve AGPL source-access obligations and tiles attribution/share-alike.

Technology: C compiled using emcc, Asyncify, IndexedDB and HTML canvas frontend. Exact web branch is brogue-js, not default master.

Makefile has WEBBROGUE=YES section, src/platform/web-platform.c, emcc, custom shell and javascript/init-mod.js.

No full build run and no test of save/reload.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Build instructions Licence evidence Licence evidence 2

Top-down co-op run-and-gun

C-Dogs SDL

Provider and source reviewed; gameplay unverified

A top-down run-and-gun port with separately licensed campaigns, graphics and audio.

Open external browser game

Code: Upstream says GPLv2 code with substantial BSD-2-Clause code; assets CC0/CC-BY/CC-BY-SA per file

Content and reuse: Original creator relicensed original graphics and included ogre/bem missions under CC-BY in 2016. Same historic discussion flags third-party campaigns and sampled sound provenance. Modern individual audio files have explicit CC-BY/CC0 notices, so do not infer all current audio is unlicensed. Audit selected bundle/campaign per file.

Contains combat or violence. Check the destination’s content before playing.

What was checked: Provider page and source references read. Cloud page creation produced title but DOM snapshots repeatedly timed out, so no usable game screen observed.

Source, remix starting point & limits

Start small: Small original campaign and player/weapon tweaks using explicitly licensed graphics/sounds.

Technology: Upstream C/SDL2 Emscripten port; host documents additional patches and disabled LAN.

make_emscripten.sh compiles source and preloads data/doc/dogfights/graphics/missions/music/sounds. Host credits separately link cdogs.diff, OPL stub and build script.

Provider says it omits Wolfenstein shareware/template data and disables noncommercial OPL synth. That provider claim is not a complete independent asset audit.

Code license does not automatically license Wolfenstein/Doom imports or every old community campaign.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Project evidence Build instructions Licence evidence Licence evidence 2

Transport/logistics management

Simutrans browser fork

Provider and build docs reviewed; runtime untested

Build a transport network in this port based on Simutrans 125.0.1. Required paksets have separate rights.

Open external browser game

Code: Engine Artistic-1.0; paksets have separate licenses

Content and reuse: Fork build selects official pak64 125.0; do not generalize engine license to all paksets. Exact current asset package contents not independently audited.

What was checked: Public provider play page and specific fork read; no runtime/gameplay attempt.

Source, remix starting point & limits

Start small: Transport scenarios, economics/configuration or original pakset items after pinning pakset source and license.

Technology: SDL2 compiled with Emscripten 4.0.7, Asyncify and FluidSynth; single-player host integration.

build.sh applies sibling simutrans.diff, but exact GitHub wasmgame directory listing contains only build.sh and ports.sh. Host credits separately provide patch. Clone alone is not established as self-contained.

Build pins Simutrans 125.0.1 commit 40bbb12894793cc7c6ae5c93f31a16e7e7707627 and pak64 125.0. Source fork has wasmgame/build.sh and ports.sh.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Project evidence Build instructions Licence evidence

Bullet-hell shooter

Taisei Project

Official link documented; availability unverified

An experimental browser build of a Touhou-inspired bullet-hell game. For original remixes, use new characters and art.

Open external browser game

Code: MIT code; soundtrack and character portraits CC-BY-4.0; additional component/background licenses

Content and reuse: COPYING identifies soundtrack/portraits and public-domain/CC0 backgrounds, but says not every old background provenance was retained. Touhou setting/characters have separate derivative-work conditions; code license does not grant franchise ownership.

Contains combat or violence. Check the destination’s content before playing.

What was checked: Exact official play URL verified in upstream README; search fetch returned HTTP 418. No browser runtime test. A current text fetch returned HTTP 418; this is not a confirmed outage.

Source, remix starting point & limits

Start small: Reuse MIT engine/pattern logic with new original characters and art to minimize franchise-rights complexity.

Technology: C11/SDL/OpenGL with experimental official WebGL build; Meson/Ninja/Emscripten workflow.

README requires recursive git submodules or full release source archive, explicitly warns ordinary GitHub Download ZIP is insufficient.

Do not add a gameplay-tested badge.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Build instructions Licence evidence

Vertical scrolling shooter

OpenTyrian KaiOS/browser fork

Source reviewed; availability unverified

A vertical-scrolling shooter port with GPLv2 engine code and separately released freeware game data.

Open external browser game

Code: GPLv2 code; original Tyrian 2.1 data is separately released freeware

Content and reuse: Freeware game-data availability is not blanket permission to alter/relicense every game asset. Obtain specific permissions or replace assets for a broad original remix.

Contains combat or violence. Check the destination’s content before playing.

What was checked: Exact play URL appears in upstream OpenTyrian issue #24. Search fetch could not access it; no current browser gameplay confirmed.

Source, remix starting point & limits

Start small: Start with original art or a small rule change in the linked source, after checking the code and content licences.

Technology: This exact pelya fork documents Emscripten asm.js with WASM=0 for old KaiOS; do not silently call it a new WASM edition.

README documents build-debug.sh/build-release.sh and separate Tyrian 2.1 data.

Do not label fully remixable assets or play-tested.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Project evidence Licence evidence

3D real-time strategy

Warzone 2100

Launcher observed; WebGL2 unavailable

The official browser real-time strategy edition, with campaign and skirmish. Mouse and keyboard are recommended.

Open external browser game

Code: GPL-2.0-or-later with notices and exceptions in COPYING.README and COPYING.NONGPL.

Content and reuse: Retain all notices and component exceptions. Do not infer the code licence alone clears each bundled or third-party asset.

Contains warfare and combat.

What was checked: Official play site and feature comparison verified; launcher explicitly reported unsupported browser because WebGL2 is disabled. No gameplay.

Source, remix starting point & limits

Start small: Review the desktop source and contribution guidance. Browser edition does not provide the desktop mod workflow.

Technology: Official browser edition; WebGL2 required.

Initialize git submodules or use full release source archive, not ordinary GitHub Download ZIP.

Browser includes the original campaign, skirmish, challenges and local saves, but not desktop online multiplayer, addon/mod workflow or higher-quality remastered graphics. Approximately 60 MiB first load; minimum 640×480 display.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Project evidence Licence evidence Licence evidence 2

Space exploration / trading / combat

Endless Sky via Endless Web

Launcher checked; WebGL2 unavailable

An ambitious browser port for space exploration, trading and combat. The test browser lacked WebGL2, so gameplay remains unverified.

Open external browser game

Code: GPL-3.0-or-later

Content and reuse: Mixed asset licenses: the copyright inventory includes CC-BY-SA 4.0, CC-BY-SA 3.0, attribution licenses, public-domain assets and Unsplash-licensed landscape images. Check the exact inventory for every image or sound, including Unsplash restrictions on competing image services and unaltered resale. Not all assets are GPL or Creative Commons. Use the current thomasballinger fork’s endless-web branch, not upstream master or an older related fork.

Contains space combat. WebGL2 required; no low-end or mobile performance guarantee.

What was checked: Current page explicitly displayed 'Not supported because your browser does not support WebGL2.' Upload/download save buttons, touch toggle, music and source links present. No game rendered. Controls documented/visible, not tested.

Source, remix starting point & limits

Start small: Try one change: New star systems, missions, factions and ships; Reduced-scope beginner campaign; Accessible trading/navigation interface.

Technology: C++20, SDL2, OpenAL, Emscripten, WebGL2

Current endless-web Makefile has make dev, Emscripten SDL2/libpng/zlib, local libjpeg-turbo build, IDBFS, Asyncify, WebGL2, preloaded content and a large initial-memory setting. Build not run. Old fork's Emscripten2.0.16 instructions should not substitute for this current Makefile.

WebGL2 required. Large content/memory footprint; no low-end or mobile guarantee. Source branch is mutable and builds must be pinned/reproduced before hosting. No Escape Velocity, Elite or other paid data. Free data/images/sounds included.

Source references and any named revisions were reviewed, but no build or served-runtime byte comparison was performed.

Port / engine source Actual current browser build Code and asset-specific licences GPL source licence

Action puzzle / level creation

Rocks'n'Diamonds

Load reached 100%; gameplay unverified

A long-running action-puzzle game and level-creation foundation. Its official browser load completed, but the test canvas stayed black.

Open external browser game

Code: GPL2 family; COPYING is GPLv2

Content and reuse: Author explicitly states source and assets in his project can be forked under GPL. Repository includes third-party contributor credits. No complete per-file media provenance audit performed. Do not automatically extend the project's grant to every separately downloaded historical/community level or art pack, or named commercial game trademarks. For a safer remix use newly authored levels and graphics and retain upstream notices.

What was checked: The official browser page reached Rocks’n’Diamonds 4.4.2.4 at 100% loaded, but its canvas stayed black across screenshots and a click/Return attempt. No cause was established and gameplay was not observed. This does not show the game is globally unavailable. Browser persistence is documented by the author, not retested.

Source, remix starting point & limits

Start small: Try one change: Original puzzle campaign; Custom element interactions; Beginner level-design tutorial.

Technology: C and SDL2 with SDL_image/SDL_mixer/SDL_net; Emscripten

Root Makefile contains emscripten target invoking emmake with PLATFORM=emscripten; browser shell under build-projects/emscripten. Built-in level editor and custom elements support levels without deep engine changes.

Standard browser build is self-contained; no purchased Boulder Dash/Emerald Mine/Supaplex files requested. Author documents browser persistence since4.2.3.0, not retested.

Source references and any named revisions were reviewed, but no build or served-runtime byte comparison was performed.

Port / engine source Official source clone and release4.4.2.4 Author's June19 2026 GPL fork/source/assets statement and GitHub mirror GPLv2 licence text Emscripten build target

Commercial-game reference, separate rights

This is a port-technology reference, not a free/open game recommendation. An open-source runtime does not grant rights to the original game, music, branding or binaries.

Unofficial commercial-game racing port

Underground 2 Revived

Commercial assets; gameplay unverified

An unofficial browser-port technology project for Need for Speed: Underground 2. The original commercial game and its assets are not open-source.

Visit external fan project

Code: MIT for repository code only; not the original game or generated game-derived binaries

Content and reuse: Original game assets and branding remain subject to their owners’ rights. Redistribution permission for hosted game files has not been established.

Unofficial fan project. Not endorsed by Electronic Arts.

What was checked: Landing page, disabled Play preflight, live source/attribution links, primary README and MIT licence inspected. No gameplay, downloads, self-build or multiplayer tested.

Source, remix starting point & limits

Start small: Inspect or improve the MIT-licensed browser runtime using the upstream contribution workflow. Using original game content requires separately lawful access and rights; no one-click full-game remix is offered.

Technology: WebAssembly / WebGPU

Port/recompiler/runtime source only. Repository states game code/data and generated game-derived outputs are excluded.

Commercial original game assets are not covered by the MIT port-code licence; no redistribution grant established. Unofficial fan project, not endorsed by Electronic Arts. A public Play button does not establish distribution rights. Live site/source revision correspondence and actual gameplay are unverified. Recent WebGPU-capable browser; our cloud browser reported GPU-ACCEL-OFF and could not play. Local development requires your own exact North American v1.2 PC game files and the upstream build toolchain. Do not download, mirror, or redistribute game-derived binaries, assets, music, or mod packs without separate rights.

Source links are not pinned to the running build. No complete source build or all-device gameplay qualification was performed for this directory.

Port / engine source Project evidence Licence evidence

Make the first remix small.

Choose a project with code and content you are allowed to change.
Read its source, asset notices and build guide. Pin the version before making changes.
Change one level, rule, control or interface detail. Test the complete play/save/reopen path.
Keep the original credits and satisfy source-sharing or attribution requirements before publishing.

No one-click full-game remix is promised. Start with original or expressly licensed content rather than assuming every file in a repository is reusable.

Keep a proposal & testing worksheet Download external references (JSON)

TURN DISCOVERY INTO A FIRST CHANGE

Find a base. Keep a real remix brief.

Search the 20 browser references by style, recorded input evidence and original-data requirements. Compare two bases, describe one change, then save a portable plan and a source-aware brief for your own assistant.

Open the game finder & remix workbench →

A planning tool, not an automatic game importer or a working remix. Code, game data and redistribution rights stay separate.

Browser games and ports.Bigger possibilities.

Try an original game. Make one change.

Embergrid Foundry — Experimental Workshop

Three new source discoveries

Hivebound

Riposte: Frontline

LibreHold

New: meaningful input checked

Zork I, II and III

Anarch

The Powder Toy

Vulture NetHack 3.6.6

Four useful starting points

Simon Tatham's Portable Puzzle Collection

Neverball

Flare: Empyrean Campaign

Freedoom Phases 1 and 2 via wasmdoom

Eight more ports to investigate

Brogue Community Edition browser fork

C-Dogs SDL

Simutrans browser fork

Taisei Project

OpenTyrian KaiOS/browser fork

Warzone 2100

Endless Sky via Endless Web

Rocks'n'Diamonds

Commercial-game reference, separate rights

Underground 2 Revived

Make the first remix small.

Find a base. Keep a real remix brief.

Browser games and ports.
Bigger possibilities.