GemRB is a portable open-source implementation of the Infinity Engine
Cross-breeding a 3D FPS with a fantasy RPG in the world of Hexen
Heros of Jin Yong 3D Remastered
An unmodified version of the MMORPG Impressive Title by KovuLKD
Opengate is a Jumpgate remake
Free MMORPG
3D Space Station Simulator (inspired by SS13)
PvP, MUD RPG.
3D urban environment renderer : browser-app ; as well as a GTA clone
plugin-based RPG manager in C++ and Qt5
Open-source 3D RTS game inspired by the Dungeon Keeper series
a 3D dungeon exploration game
Free 3D Roguelike action RPG
A 2D Adventure Game & Engine