Tuxemon

A 2D space exploration, trading and combat game: fly between star systems, take missions, upgrade your ship and get drawn into a sweeping story.

A multiplayer open-world voxel RPG: explore a vast procedurally generated world, fight, craft and adventure.

A multiplayer game about paranoia and chaos on a space station. Remake of the cult-classic Space Station 13.

A browser RPG that teaches programming: solve coding challenges in the game world to advance your adventure.

/tg/station, one of the largest Space Station 13 codebases: a multiplayer space-station role-playing game (requires the BYOND client).

A command-line RPG that turns your filesystem into a dungeon: use it in place of cd and you’ll randomly meet enemies, with levels, gear and classes.