GPL-3.0
Mindustry
Build factories and defend them from waves of enemies.
GPL-3.0 · 160.5
Upstream projectMod & Mashup
Mashups and mods are made in the Prism app on your computer: pick two games to mash up, or one to mod with AI.
- Install a free game in the app
- Pick one to mod, or two to mash up
- Change it with AI, then play it
Start with a free game
Free, open-source games made to be changed. Install one in the Prism app, then remix it with AI.
GPL-3.0-or-later
Veloren
Explore, fight and craft in a vast voxel fantasy world.
GPL-3.0-or-later · some assets CC-BY-NC-SA-4.0 · 0.18.0
Upstream projectGPL-2.0-only
OpenTTD
Grow a transport empire by rail, road, sea and air.
GPL-2.0-only · CC-BY-SA-3.0 · 15.3 · OpenGFX 8.0 · OpenSFX 1.0.3 · OpenMSX 0.4.2
Upstream projectGPL-2.0-or-later
0 A.D.
Lead ancient civilizations in real-time strategy battles.
GPL-2.0-or-later · CC-BY-SA-3.0 · 0.28.0
Upstream projectGPL-3.0-or-later
Xonotic
Fast arena shooter with bots, a campaign and moddable maps.
GPL-3.0-or-later · GPL-2.0-or-later · 0.8.6
Upstream projectGPL-2.0-or-later
The Battle for Wesnoth
Turn-based fantasy battles and full solo campaigns.
GPL-2.0-or-later · CC-BY-SA-4.0 · 1.18.8
Upstream projectGPL-2.0-or-later
Warzone 2100
Build bases, design units and lead armies in 3D battles.
GPL-2.0-or-later · GPL-3.0 build · CC-BY-SA-3.0 · CC0 · 4.7.0
Upstream projectGPL-3.0-or-later
SuperTuxKart
Kart racing with power-ups, battles and split-screen play.
GPL-3.0-or-later · CC-BY-SA · mixed assets · 1.5
Upstream projectGPL-3.0-or-later
OpenHV
Pixel-art sci-fi strategy with skirmish bots and missions.
GPL-3.0-or-later · CC-BY-SA-4.0 · CC-BY-3.0-US · some CC-BY-NC sounds · 20250725 · OpenRA release-20250330
Upstream projectZlib
DDNet
Hook, jump and race through tricky 2D co-op maps.
Zlib · CC-BY-SA-3.0 · mixed assets · 20.1.1
Upstream projectGPL-3.0-or-later
Endless Sky
Explore space, trade and create ships or missions.
GPL-3.0-or-later · CC · Unsplash · 0.11.2
Upstream projectLGPL-2.1-or-later
Luanti + Minetest Game
Build worlds and experiment with Lua mods.
LGPL-2.1-or-later · CC-BY-SA-3.0 · 5.17.0
Upstream projectBSD-3-Clause
Freedoom
Classic first-person action with free maps and assets.
BSD-3-Clause · GPL-2.0-or-later · 0.13.0 · Chocolate Doom 3.1.1
Upstream projectZlib
Teeworlds
Fast multiplayer arenas with grappling hooks.
Zlib · CC-BY-SA-3.0 · 0.7.5
Upstream projectGames keep their original licenses. Check each asset’s terms before sharing a mashup.