GemRB is a portable open-source implementation of the Infinity Engine
Game engine to build text adventures.
Action RPG that's easy to mod
Arianne is an engine to develop multiplayer online games like Stendhal
Heros of Jin Yong 3D Remastered
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
A space race game in the style of A Dark Room
Processes dialogue text files exported by the Bethesda Softworks SDK
IRB is a game creation toolkit
3D urban environment renderer : browser-app ; as well as a GTA clone
plugin-based RPG manager in C++ and Qt5
A space game in the Hoshikaze 2250 universe, built on the NAEV engine
Built to be ease of use, with no programming knowledge, Multi-platform
A 2D Adventure Game & Engine
LAIR is a Sandbox Dungeon Crawling Game