THE OPEN GAME COLLECTION

A whole world.
Your next idea.

Play something worth changing. Take its source. Give your AI a new direction.

Explore the games ↓Browser & desktop · Original creators credited
Commons Relay gameplay: rival creatures face the three glowing relay hexes on a forest battlefield.
PLAY OUR REAL AI REMIX

Commons Relay ↗

Ancient Beast’s world. A new capture-and-hold battle.

PLAY HERE · NO ACCOUNT

New: play Datakin Relay—creator-permitted levels, editable route kit & AI handoff →

FIND YOUR STARTING POINT

Good games. Open possibilities.

12 independent games with source.
Play at the creator’s site. Build your own version.

What do you want to make?

All games 12

Ten directions to explore. We’re building the collection; some categories are waiting for their first reviewed game.

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6 games in Strategy · Original creators credited. Code and artwork terms are shown separately.

Armies, economies and decisions that change the map. Clear genre ×

Creatures face off on the hexagonal Dark Forest battlefield in Ancient Beast.PLAY IN BROWSER ↗
TACTICAL STRATEGYBROWSER

Ancient Beast

What would your own creature faction play like?

By Freezing Moon and Ancient Beast contributors

Browser play / demoOpen source
Play original ↗Get source ↗

Play Commons Relay—our real AI remix →

Remix with your AI →

A first idea: Add a beginner training scenario using existing creatures, with clear explanations of range and turn order.

Give this brief to your own assistant. It includes the pinned source, original credit, setup, reuse terms and a first task.

Download brief

Read or select the full brief
Source, setup & reuse terms

Build an army of creatures with distinct abilities and fight across a hex battlefield. A substantial browser strategy game with an existing playable hotseat mode.

Code & assets

Code: AGPL-3.0
Assets: CC BY-SA 4.0 artwork and audio; retain individual author credits. Name and logo are trademarks of Freezing Moon.

Original licence notices ↗

What you need

Upstream repository plus package dependencies. Dependency installation and a local build are required; the source ZIP is not a ready-to-play game.

  1. For a local remix, install Git and the Bun version specified by the pinned package.json.
  2. Inspect the pinned contribution guide, dependency scripts and asset notices before installing dependencies.
  3. The official player is a separate deployed release; this pinned development source is not claimed to reproduce it.
External source ZIP ↗Setup guide ↗

Reviewed source d37961462eb91f97e81710ede456346148cd2522

Official v0.5.1-alpha player opened in local Chrome without sign-in; a two-player hotseat match reached Round 1 and the Delay Unit control changed the unit state. Full match, multiplayer, mobile and local-source build remain unverified.

  • If you run a modified network version, preserve the AGPL source-availability obligations.
  • Use a distinct name for your fork and preserve attribution; do not imply official endorsement.

1,882 GitHub stars · Repository not archived
Checked 2026-10-19 · latest push 2026-10-16

Saved GitHub information.

Repository activity is separate from the reviewed source version. GitHub’s licence detection does not clear artwork rights.

Screenshot sources & credits ↗

A dense Mindustry factory supplies defensive turrets across a rocky battlefield.GET DESKTOP GAME ↗
FACTORY / TOWER DEFENSEDESKTOP

Mindustry

Turn the same machines into a new survival challenge.

By Anuken and Mindustry contributors

Desktop downloadOpen source
Get game ↗Get source ↗
Remix with your AI →

A first idea: Make a short survival map or content mod that changes one production or defense rule using existing assets.

Give this brief to your own assistant. It includes the pinned source, original credit, setup, reuse terms and a first task.

Download brief

Read or select the full brief
Source, setup & reuse terms

Combine supply chains, factory production and defensive combat across maps and campaigns.

Code & assets

Code: GPL-3.0
Assets: The repository carries GPL-3.0; preserve resource, dependency and author notices. Audit any additional mod artwork separately.

Original licence notices ↗

What you need

Game source and resources with Gradle-managed dependencies; generated classes are produced during the build. A source ZIP is not an executable game.

  1. The pinned README requires JDK 17 and the included Gradle wrapper.
  2. Inspect dependency and build scripts before building the desktop target.
  3. Start with a small content mod or map using existing assets; use the project wiki for mod formats.
External source ZIP ↗Setup guide ↗Modding guide ↗

Reviewed source 84fd6bf8f42128bbdaa4799670694a83b6c61adb

Pinned README, GPL licence, official release path and modding documentation reviewed. Desktop installation, local build and mod acceptance not run.

  • Use official release downloads to play; desktop binaries are external.
  • Keep GPL and third-party notices when distributing a modified game.

29,405 GitHub stars · Repository not archived
Checked 2026-10-19 · latest push 2026-10-19

Saved GitHub information.

Repository activity is separate from the reviewed source version. GitHub’s licence detection does not clear artwork rights.

Screenshot sources & credits ↗

Armoured vehicles and aircraft clash around a large Warzone 2100 base.GET DESKTOP GAME ↗
3D REAL-TIME STRATEGYDESKTOP

Warzone 2100

A new mission inside a working strategy game.

By Pumpkin Studios, Warzone 2100 Project and contributors

Desktop downloadOpen source
Get game ↗Get source ↗
Remix with your AI →

A first idea: Create one short JavaScript-scripted skirmish objective using existing maps and units before changing the engine.

Give this brief to your own assistant. It includes the pinned source, original credit, setup, reuse terms and a first task.

Download brief

Read or select the full brief
Source, setup & reuse terms

Command customizable vehicles, research technologies and rebuild after a global catastrophe in a substantial 3D RTS.

Code & assets

Code: GPL-2.0-or-later
Assets: GPL material plus exceptions in COPYING.NONGPL, including CC BY-SA 3.0, CC0, OFL and other dependency/resource licences. Retain individual notices.

Original licence notices ↗ · Asset notices ↗

What you need

Source requires Git submodules and revision information. No misleading complete ZIP is offered. Use the upstream clone/build instructions and optional video package.

  1. Use a recursive Git clone and check out the pinned commit, then update submodules recursively.
  2. The upstream README explicitly warns against GitHub Download ZIP: it lacks submodules and revision information.
  3. Use the documented CMake/toolchain setup; campaign videos are a separate optional download.
Setup guide ↗

Reviewed source b738e6875d1545c0ecd0e4c328398cc2f02c4811

Pinned build and licensing records reviewed, including the source-ZIP warning. Desktop gameplay, compilation and mission editing not run.

  • Follow the upstream build guide and preserve per-file artwork licences.
  • Official binaries may be a different revision from this source snapshot.

4,004 GitHub stars · Repository not archived
Checked 2026-10-19 · latest push 2026-10-17

Saved GitHub information.

Repository activity is separate from the reviewed source version. GitHub’s licence detection does not clear artwork rights.

Screenshot sources & credits ↗

Cities and roads spread across the three-dimensional Freeciv-web world map.PLAY IN BROWSER ↗
CIVILIZATION STRATEGYBROWSER

Freeciv-web

Rewrite a civilization’s rules, not its entire engine.

By Freeciv-web and Freeciv contributors, including Andreas Røsdal

Browser play / demoOpen source
Play original ↗Get source ↗
Remix with your AI →

A first idea: Prototype one small ruleset or beginner-interface change, then test a short solo scenario on a local server.

Give this brief to your own assistant. It includes the pinned source, original credit, setup, reuse terms and a first task.

Download brief

Read or select the full brief
Source, setup & reuse terms

Build cities, direct an economy and guide a civilization against computer or human opponents through a web browser.

Code & assets

Code: AGPL-3.0 client; GPL server
Assets: Freeciv tilesets, music and other resources retain their individual notices and licences. Check the selected tileset and bundled components before changing or redistributing assets.

Original licence notices ↗

What you need

Client, server integration and setup scripts with externally fetched components. The linked community server runs its own fork; its live build is not claimed to match this pinned upstream commit.

  1. This is a browser client plus server stack, not a self-contained HTML game.
  2. Follow the pinned Docker/Vagrant or manual setup instructions and inspect installer scripts first.
  3. Choose a small ruleset or interface change and establish a local server baseline before testing it.
External source ZIP ↗Setup guide ↗

Reviewed source c19ce060fadc99663f8aba3652ca94b07174467c

Pinned upstream README/licence and the README-listed community play link reviewed. Server setup, hosted full match and independent remix not verified.

  • The external server controls its own availability, accounts and save rules.
  • Serving a modified AGPL client requires corresponding source availability; retain component notices.

2,211 GitHub stars · Repository not archived
Checked 2026-10-19 · latest push 2026-03-27

Saved GitHub information.

Repository activity is separate from the reviewed source version. GitHub’s licence detection does not clear artwork rights.

Screenshot sources & credits ↗

A code-drawn Reversi board on the Godot Reversi title card.PLAY IN BROWSER ↗
BOARD STRATEGYBROWSER

Godot Reversi

Give a classic board game a new opponent or learning mode.

By Regi Ellis

Browser play / demoOpen source
Play original ↗Get source ↗
Remix with your AI →

A first idea: Add a beginner hint or an alternate computer-opponent style, then verify legal moves and end-game scoring against the original rules.

Give this brief to your own assistant. It includes the pinned source, original credit, setup, reuse terms and a first task.

Download brief

Read or select the full brief
Source, setup & reuse terms

A complete Reversi game with a polished, code-drawn interface and an approachable Godot project. Its author presents it as a teaching example built with AI agents and a live editor.

Code & assets

Code: MIT
Assets: The game, widget kit and board renderer are MIT; bundled sound effects are CC0 and Bungee font is SIL OFL 1.1. See NOTICE and included font licence.

Original licence notices ↗

What you need

Complete Godot game snapshot with scenes, scripts, generated board/UI and bundled sound/font assets. It is a teaching artifact and is not maintained as a standalone product.

  1. Open the pinned project with Godot 4.7 or use the author's browser build.
  2. The repository is a one-way snapshot; upstream issues and changes are tracked in the original godot-mcp-go repository.
  3. Preserve bundled CC0/OFL notices as applicable.
External source ZIP ↗Setup guide ↗

Reviewed source 70586efafbc762efa16f5680ca0b90366eccc698

Pinned README and licence/NOTICE inspected. In desktop Chrome the official browser build loaded without sign-in; a normal-computer match started, one legal black move was accepted, the computer responded and the board reached 3–3. Full match, mobile and local project import remain unverified.

  • This is a focused board game and teaching example, not a large commercial-scale game.
  • The cover image is an illustrative title card, not an in-gameplay screenshot.

0 GitHub stars · Repository not archived
Checked 2026-10-20 · latest push 2026-09-07

Saved GitHub information.

Repository activity is separate from the reviewed source version. GitHub’s licence detection does not clear artwork rights.

Screenshot sources & credits ↗

Actual Tactical Slash gameplay, with a three-character squad on a 3D tactical grid.PLAY IN BROWSER ↗
3D TACTICAL RPGBROWSER

Tactical Slash

What would a new mission or a fourth character class change?

By Sion RGB

Browser play / demoOpen source
Play original ↗Get source ↗
Remix with your AI →

A first idea: Add one tactical mission or fourth character class, retaining the original asset and source notices.

Give this brief to your own assistant. It includes the pinned source, original credit, setup, reuse terms and a first task.

Download brief

Read or select the full brief
Source, setup & reuse terms

Lead a swordsman, archer and priest through a turn-based 3D battle. Position your squad, use line of sight, heal allies and outplay class-aware enemy AI.

Code & assets

Code: MIT — original Tactical Slash code, copyright 2026 Sion RGB
Assets: CC0 1.0 — KayKit models by Kay Lousberg, Nature Kit by Kenney, Cloud Layers HDRI by Greg Zaal / Poly Haven. Retain the asset inventory and original notices.

Original licence notices ↗ · Asset notices ↗

What you need

Godot source and processed runtime GLB/HDR assets are committed. Original downloaded source-art packs and local Blender/export tools are separate; the pinned README explains how to reproduce processed art. A source archive is not a ready-to-play executable.

  1. Use the upstream Godot 4.7 stable requirement; this project was not checked with our hosted 4.6 runtime.
  2. Inspect project.godot, the pinned README, scripts and notices before importing or running downloaded code.
  3. Use the official external browser player to play. This project is linked rather than loaded into the Game Commons Godot iframe.
External source ZIP ↗Setup guide ↗

Reviewed source 8bf8d835cb7afa7cb3f4d893b0966c6b4e9b7727

Pinned README, MIT source licence, asset inventory and six CC0 notices inspected. Official browser game loaded without sign-in in local desktop Chrome; Round 01 appeared, Swordsman A was selected and moved to a blue tile, with Movement complete and Moved: Yes displayed. Full combat, match completion, mobile and local import/build remain unverified.

  • A compact independent tactical encounter; not a commercial-scale RPG.
  • The official browser export may differ from this pinned source. Full match and local build remain unverified.

2 GitHub stars · Repository not archived
Checked 2026-10-20 · latest push 2026-07-13

Saved GitHub information.

Repository activity is separate from the reviewed source version. GitHub’s licence detection does not clear artwork rights.

Screenshot sources & credits ↗

HOW ONE GAME CAN ENTER ANOTHER

Real cross-game bridges.

These external mods demonstrate character, mechanics and world integration. Their open code does not include the original commercial games. They are references for the technique, separate from the reusable game catalogue above.

Mario 64 inside Elden Ring

A real movement and character integration: libsm64 runs Mario against Elden Ring’s collision, with a native mod connecting the systems.

By deltarooo and contributors · MIT mod; CC0 libsm64

Requirements & source

Your own Elden Ring install and compatible US Super Mario 64 ROM. Game data is not included or licensed by the mod.

Experimental Windows/native mod. Follow the original offline-only instructions and separate-save guidance.

No AI-authorship claim found in the reviewed README.

Source snapshot 11744b855bf546ca0b66dfd09068858feaa18d0e

Explore pinned bridge code ↗
Creator’s setup & licence details ↗

Game Commons has not installed or run this mod.

Minecraft inside Skyrim

Runs both games and connects them through a Skyrim plugin, Minecraft mod and shared memory, bringing blocks and Minecraft systems into Skyrim.

By chasmlol and contributors · MIT bridge code

Requirements & source

Your own Skyrim Special/Anniversary Edition and Minecraft Java entitlement. Neither game is included.

Experimental native Windows setup with SKSE, Fabric and additional tools. Read the original compatibility and resource requirements.

No AI-authorship claim found in the reviewed README.

Source snapshot bfcaf178524b92c2cdeb88e4ce0f13ef9ded6f32

Explore pinned bridge code ↗
Creator’s setup & licence details ↗

Game Commons has not installed or run this mod.

Minecraft inside GTA V

A Minecraft/GTA bridge example using game-side plugins, shared state and depth compositing while both games run.

By rehan-remade and Universal Modder contributors · MIT framework and example code; retain component notices

Requirements & source

Your own compatible Minecraft Java and GTA V installs. No GTA or Minecraft game data is provided by Game Commons.

Complex experimental native toolchain; the creator documents GTA Story Mode/offline use. This is an external source reference, not a browser player.

The example README explicitly credits Claude Code; that is the creator’s disclosure, not an independent authorship audit.

Source snapshot 6a8865ae171b406f50892c7f46fc5f45655269eb

Explore pinned bridge code ↗
Creator’s setup & licence details ↗

Game Commons has not installed or run this mod.

YOUR PROJECT COULD BE SOMEONE’S BEGINNING

Made a game?
Give it a future.

Finished or unfinished, browser or desktop: suggest your public repository and playable build. Include code and asset licences, what works, and one thing you wanted to build next.

Return a remix for private review →Suggest an existing game →Source-link suggestions are privately reviewed before listing. Small MIT HTML games can also use the prototype’s signed-in uploader. General multi-file uploads are not available. Listings are independent curation, not partnerships or AI-authorship claims. Third-party availability and account requirements can change.