GemRB is a portable open-source implementation of the Infinity Engine
Action RPG that's easy to mod
Cooperative multiplayer graphical RPG and adventure game
Arianne is an engine to develop multiplayer online games like Stendhal
Defeat all the beasties to claim victory!
A roguelike, contains binaries and source packages for
3D urban environment renderer : browser-app ; as well as a GTA clone
plugin-based RPG manager in C++ and Qt5
Built to be ease of use, with no programming knowledge, Multi-platform
A 2D Adventure Game & Engine
LAIR is a Sandbox Dungeon Crawling Game