Zig game engine & graphics toolkit
A game engine powered by python and panda3d
Descent 3 by Outrage Entertainment
lua dev plugin for unreal engine 4 or 5
Game engine supporting many 3D/2D formats and graphic effects
2D JavaScript Physics Engine
High performance UI layout library in C
Orx: Portable Game Engine
Chess Database and PGN viewer
0 A.D. is a free, open-source, cross-platform real-time strategy game.
A cross-platform port of Hexen II game.
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Action RPG that's easy to mod
A work-in-progress chess bot written in C#
The multiplayer game engine
An ASI plugin for Grand Theft Auto V
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
8-bit Graphical API for Java
Source code of the chapters of the book 3D Game Development with LWJGL
Web powered cross-platform 3D, WebXR game engine
DarkForest, the Facebook Go engine
scriptable game engine with built-in support for 2D graphics and sound
Extensive Java chess database libraries.
3D .NET engine for Windows, Linux, Mac