Awesome Open Source Games

OpenRA/OpenRA

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

Stack

C# .NET SDK

GitHub topics

#command-and-conquer #cross-platform #csharp #dotnet #dune-2000 #engine

Updated: 2026-06-09
Lists: 1 list mention
First commit: 2007-06-19
License: GPL-3.0
Issues: 1,615 open

16,779

stars

Forks: 2,946
Commits: 30,822 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

playcanvas/engine

Powerful web graphics runtime built on WebGL, WebGPU, WebXR and glTF

AI dev

Stack

JavaScript React Vite npm

GitHub topics

#3d-gaussian-splatting #3dgs #game-development #game-engine #gamedev #gaussian-splatting

Updated: 2026-06-11
Lists: 1 list mention
First commit: 2011-10-24
License: MIT
Issues: 601 open

16,003

stars

Forks: 1,914
Commits: 13,092 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

OpenRCT2/OpenRCT2

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Stack

C++ Android CMake .NET SDK Gradle

GitHub topics

#c-plus-plus #cmake #cpp #discord #game #hacktoberfest

Updated: 2026-06-11
Lists: 2 list mentions
First commit: 2014-04-01
License: GPL-3.0
Issues: 1,618 open

15,818

stars

Forks: 1,818
Commits: 30,172 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

SFTtech/openage

Clone of the Age of Empires II engine 🚀

Stack

Python CMake pip

GitHub topics

#age-of-empires #c-plus-plus #cmake #cpp #cpp20 #engine

Updated: 2026-06-07
Lists: 1 list mention
First commit: 2013-08-22
License: NOASSERTION
Issues: 213 open

14,245

stars

Forks: 1,248
Commits: 5,815 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

mapeditor/tiled

Flexible level editor

AI dev

Stack

C++ CMake Maven npm

GitHub topics

#c-plus-plus #editor #game #game-development #hacktoberfest #java

Updated: 2026-06-10
Lists: 1 list mention
First commit: 2008-05-05
License: NOASSERTION
Issues: 812 open

12,639

stars

Forks: 1,929
Commits: 7,091 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

CleverRaven/Cataclysm-DDA

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

AI dev

Stack

C++ Android CMake .NET SDK Gradle

GitHub topics

#c-plus-plus #cataclysm #game #hacktoberfest #zombies

Updated: 2026-06-11
Lists: 1 list mention
First commit: 2010-10-04
License: NOASSERTION
Issues: 2,900 open

12,430

stars

Forks: 4,529
Commits: 128,606 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

SFML/SFML

Simple and Fast Multimedia Library

Stack

C++ Android CMake Gradle

GitHub topics

#audio #c-plus-plus #cross-platform #games #graphics #hacktoberfest

Updated: 2026-05-29
Lists: 1 list mention
First commit: 2009-01-28
License: Zlib
Issues: 151 open

11,900

stars

Forks: 1,894
Commits: 3,953 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

melonjs/melonJS

a modern & lightweight HTML5 game engine

Stack

JavaScript React Vite npm pnpm

GitHub topics

#2d-game-engine #canvas2d #contributions-welcome #es6 #game-development #game-engine

Updated: 2026-06-08
Lists: 1 list mention
First commit: 2011-04-11
License: MIT
Issues: 20 open

6,309

stars

Forks: 663
Commits: 7,838 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

jMonkeyEngine/jmonkeyengine

A complete 3-D game development suite written in Java.

Stack

Java Gradle

GitHub topics

#game-engine-3d #hacktoberfest #java #jme3 #jmonkeyengine #jmonkeyengine3

Updated: 2026-06-11
Lists: 1 list mention
First commit: 2011-03-14
License: BSD-3-Clause
Issues: 261 open

4,234

stars

Forks: 1,178
Commits: 8,948 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

MovingBlocks/Terasology

Terasology - open source voxel world

Stack

Java Gradle

GitHub topics

#game #game-development #game-engine #game-engine-3d #gamedev #hacktoberfest

Updated: 2026-04-19
Lists: 1 list mention
First commit: 2011-03-04
License: Apache-2.0
Issues: 481 open

3,864

stars

Forks: 1,372
Commits: 12,097 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

SuperTux/supertux

SuperTux source code

Stack

C++ Android CMake Gradle vcpkg

GitHub topics

#c-plus-plus #game #games #hacktoberfest #opengl #sdl

Updated: 2026-06-11
Lists: 1 list mention
First commit: 2003-04-09
License: GPL-3.0
Issues: 367 open

3,049

stars

Forks: 582
Commits: 14,579 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

evennia/evennia

Python MUD/MUX/MUSH/MU* development system

AI dev

Stack

Python Django Django REST Framework Jupyter Tornado PEP 517 pip uv

GitHub topics

#based #django #engine #game-development #game-engine #gamedev

Updated: 2026-05-19
Lists: 1 list mention
First commit: 2006-11-20
License: BSD-3-Clause
Issues: 142 open

2,067

stars

Forks: 767
Commits: 10,389 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

ppy/osu-framework

A game framework written with osu! in mind.

Stack

C# .NET SDK

GitHub topics

#game-engine #game-frameworks #hacktoberfest #osu

Updated: 2026-06-08
Lists: 1 list mention
First commit: 2016-08-26
License: MIT
Issues: 470 open

1,968

stars

Forks: 481
Commits: 26,291 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

GitHub

FreezingMoon/AncientBeast

The Turn Based Strategy Game/eSport. Master your beasts! 🐺

Stack

TypeScript npm

GitHub topics

#2d-game #chess #esport #game #hacktoberfest #hacktoberfest2025

Updated: 2026-06-11
Lists: 1 list mention
First commit: 2011-07-22
License: AGPL-3.0
Issues: 458 open

1,853

stars

Forks: 698
Commits: 6,214 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

bemusic/bemuse

⬤▗▚▚▚ Web-based online rhythm action game. Based on HTML5 technologies, React, Redux and Pixi.js.

Stack

TypeScript Express React npm pnpm Yarn

GitHub topics

#bms #bmson #docusaurus #hacktoberfest #html5 #javascript

Updated: 2024-09-03
Lists: 1 list mention
First commit: 2014-11-25
License: AGPL-3.0
Issues: 36 open

1,229

stars

Forks: 157
Commits: 3,096 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

cxong/cdogs-sdl

Classic overhead run-and-gun game

Stack

C CMake Conan Poetry

GitHub topics

#2d #2d-game #c #game #games #hacktoberfest

Updated: 2026-06-03
Lists: 1 list mention
First commit: 2006-04-01
License: GPL-2.0
Issues: 124 open

1,058

stars

Forks: 147
Commits: 4,428 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

Mudlet/Mudlet

⚔️ A cross-platform, open source, and super fast MUD client with scripting in Lua

AI dev

Stack

C++ Qt CMake

GitHub topics

#c-plus-plus-17 #cpp #cross-platform #game #hacktoberfest #linux

Updated: 2026-06-05
Lists: 1 list mention
First commit: 2009-01-24
License: GPL-2.0
Issues: 566 open

885

stars

Forks: 360
Commits: 7,483 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

ddnet/ddnet

DDraceNetwork, a free cooperative platformer game

Stack

C++ Android Warp Cargo CMake Gradle

GitHub topics

#2d-game #ddnet #game #hacktoberfest #linux #macos

Updated: 2026-06-11
Lists: 2 list mentions
First commit: 2007-05-22
License: NOASSERTION
Issues: 978 open

784

stars

Forks: 612
Commits: 24,780 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

redeclipse/base

Base environment for Red Eclipse and associated source files.

Stack

C++ CMake .NET SDK pip

GitHub topics

#game #game-engine #hacktoberfest #main-project #source-code

Updated: 2026-04-08
Lists: 2 list mentions
First commit: 2015-02-04
License: Unknown
Issues: 231 open

520

stars

Forks: 106
Commits: 8,015 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

GlPortal/glPortal

:video_game: Open Source teleportation based first person puzzle-platformer

Stack

C++ CMake

GitHub topics

#3d #game #hacktoberfest #opengl #physics #sdl

Updated: 2024-10-05
Lists: 1 list mention
First commit: 2012-09-07
License: NOASSERTION
Issues: 17 open

378

stars

Forks: 115
Commits: 2,079 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

H-uru/Plasma

Cyan Worlds's Plasma game engine

Stack

C++ CMake pip vcpkg

GitHub topics

#c-plus-plus #game-engine #hacktoberfest #myst #plasma #uru

Updated: 2026-06-11
Lists: 1 list mention
First commit: 2011-03-12
License: GPL-3.0
Issues: 120 open

234

stars

Forks: 85
Commits: 6,662 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

Crazy-Marvin/PimplePopper

Game to pop pimples using the awesome Godot Engine

Stack

GDScript

GitHub topics

#blackhead #crowdin #cyst #game #godot #godot-engine

Updated: 2026-01-06
Lists: 1 list mention
First commit: 2020-06-24
License: MIT
Issues: 6 open

46

stars

Forks: 18
Commits: 431 commits
Star growth, last 7 days: 0 0.0%
Commit velocity, last 7 days: 0 0.0%

Website GitHub

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