Real Time Strategy game engine supporting early Westwood classics
3D game engine/framework in C, with Luajit and Python bindings now
lua dev plugin for unreal engine 4 or 5
Game engine supporting many 3D/2D formats and graphic effects
A Rust framework for building Minecraft servers
GemRB is a portable open-source implementation of the Infinity Engine
Action RPG that's easy to mod
Orx: Portable Game Engine
A companion for your LOTRO activities
A free transportation simulator game
Good-looking and addictive OpenSource games
A modern, cross-platform Quake game engine based on FitzQuake.
Arianne is an engine to develop multiplayer online games like Stendhal
Odamex is a free, cross-platform, modern client-server Doom engine
A cross-platform port of Hexen II game.
Computer opponent for the board game Blokus.
An open-source Phantasy Star Online server for *nix
A free 3d game for PC that does not limit the player. Fight,Build,Gain