Game engine supporting many 3D/2D formats and graphic effects
Game engine to build text adventures.
ESP32 Display Controller (VGA, PAL/NTSC Color Composite, SSD1306, ST77
GemRB is a portable open-source implementation of the Infinity Engine
Retro game engine for creating games like it's 1997
Action RPG that's easy to mod
Orx: Portable Game Engine
Open source reimplementation of GTA San Andreas game engine in Unity
Amazing Adventure-Cheat Engine
Pink Panther-Cheate Engine
Fruit Ninja - Cheat Engine
BookWorm-Cheat Engine
Europa Universalis 4 save game editor
Farm_Mania_HV-Cheat Engine
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
A companion for your LOTRO activities
A free transportation simulator game
An isometric arcade-style game of skill, puzzles and exploration
A greedy game engine for greedy programmers
A modern, cross-platform Quake game engine based on FitzQuake.
Good-looking and addictive OpenSource games