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 two BeeStation servers, hosted by Crossedfall.
Download BYOND to play.
BeeStation Golden (LRP): <byond server=golden.beestation13.com port=7777">byond://golden.beestation13.com:7777</byond>
BeeStation Sage (MRP): <byond server=sage.beestation13.com port=7878>byond://sage.beestation13.com:7878</byond>
Check out these maps that come packaged by default in the game.