What is it?
/tg/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 attrocious controls and limited graphical capability. Despite its shortcomings, it's amazingly fun for what it is. Prepare to lose many hours to it.
How do I play?
Oh God I am lost wat do?
This is normal. SS13 is renowned for its robust GUI and combat system! We maintain a getting started guide for new players on our wiki. There's lot of other information on the wiki that will rapidly prepare you for your first game. Our forums also have several guides that might help you once you're comfortable with the basics. And of course, actually joining the game and asking for help via the 'OOC' command is encouraged. Our community is very receptive to new bloo-- er, players.
Did /tg/ write this themselves?
Short answer: No. The game is based on Revision 4407 of the Goonstation Space Station 13 release. The Something Awful Goons in turn got their code from SS13's original developers. /tg/ got their hands on the code after several, several people had had their way with it. Thanks to the efforts of many dedicated people, we've made the /tg/ branch of SS13 our own.
Why don't you have [x]? Goonstation's had [x] for months.
The Goons don't keep their code open sourced. They were gracious enough to provide a public release back in April; the version our code is based on now. Any changes, additions, or removals since then have not been published. They've given us a few important pieces of code since then (the Singularity, updated Cyborg code, etc.) but for the most part we are on our own when it comes to development.
How can I help?
Good news! We're open source and we'd love your help. Our Google Code project page contains instructions detailing how to download the latest SVN of our code. If you'd like to become a contributor yourself, drop by irc.rizon.net, channel #tgstation13 and let us know! Alternatively you can post on the forums. We look forward to seeing you!