Odamex is a free, cross-platform, modern client-server Doom engine
A free 3d game for PC that does not limit the player. Fight,Build,Gain
A fun realistic multiplayer free-and-open-source first-person-shooter!
A collection of all maps and games made for the TripleA game engine
Java decentralized cross-platform network multiplayer game engine
Free strategy browsergame engine.
Library for creating turn-based games with simultaneous moves.
A Dungeons & Dragons Miniature Game.
Studio 1805 Unity MORPG project
Game engine and ready browser game Pulsar Online