Space Station 13 is a paranoia-laden roleplaying game set against the backdrop of a nonsensical, metal death trap masquerading as a space station.
Read more here.
There is currently one BeeStation server, hosted by Crossedfall.
Download BYOND to play.
BeeStation LRP: byond://golden.beestation13.com:7777
Check out these maps that come packaged by default in the game.