Game engine supporting many 3D/2D formats and graphic effects
GemRB is a portable open-source implementation of the Infinity Engine
3D modeler, 3D game maker, 3D demo maker
Orx: Data-Driven Game Engine
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Action-adventure game originally released in 2013
A free 3d game for PC that does not limit the player. Fight,Build,Gain
A cross-platform port of Hexen II game.
Soccer-themed 3D Sokoban Game
A promising chess program
World Class Leader Board Editor.
3D OpenGL dungeon game using Ada: a tribute to Narbacular Drop
Embeddable unity game engine view for Flutter
Free Texas Holdem Poker game using HTML5, CSS and JavaScript
The multiplayer game engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
Urho3D Game engine
A cross-platform, open-source, pure C game engine for mobile game
Engo is an open-source 2D game engine written in Go
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
KotCity, an open source city simulator
Go 3D Game Engine
Cinema Enters Game Console