Voxel game-creation platform with easy modding and game creation
Open-source engine for Heroes of Might and Magic III
Orx: Data-Driven Game Engine
Game engine supporting many 3D/2D formats and graphic effects
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
GemRB is a portable open-source implementation of the Infinity Engine
A modern, cross-platform Quake game engine based on FitzQuake.
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Embeddable unity game engine view for Flutter
A conservative source port of Hexen that is identical to DOS
A conservative source port of Heretic that is identical to DOS
Open source reimplementation of GTA San Andreas game engine in Unity
Conservative port of BOOM 2.02 to modern systems.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
DOOM / Heretic / Hexen source port with enhanced graphics and UI
2D Game Engine
Cross-platform 2D and 3D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
Portable game engine with main focus on point-and-click adventures
Game engine for playing tomb raider 1 - 5 levels.