Space Station 13 is a paranoia-laden roleplaying game set against the backdrop of a nonsensical, metal death trap masquerading as a space station. The game is 2D, sprite, and tile-based. It’s written in BYOND, which accounts for its atrocious controls and limited graphical capability.
Despite its shortcomings, it’s amazingly fun for what it is.
I do some occasional patches and additions to the OpenSource /TG/Station13 codebase.