Space Station 13.
I've been playing it for years now, and it's always so much fun.
The premise is simple : You arrive as a crew member of a space station (randomly named every round), where you must do your assigned job in relative peace. That is until one of the randomly chosen traitor (which can be anyone!) suddenly decide to push you down, knock you uncounscious, drag you into a dark maintenance hallway and strangle you to death. Then strip you of your belongings.
Basically, SS13 is a round based (each of them lasting between 50 to 100 mins on average) online RPG 'realistic' space station simulation featuring low-res simple graphics, a minimum of roleplay demanded (the Gibbed server #3 and 4 are pretty lax on this), unforgiving controls (seriously, it takes some time to get confortable with it), bombs, clowns, monkeys, wizards, clowns with bombs, a random naked crew running and screaming, intriguing rounds of hide and seek as the security team try to capture a changeling alien disguising itself as any previously dead crew member, and etc...
Everything in the station can be destroyed and / or constructed, with a full electricity system, oxygen, heat/cold, light/darkness...
I could go on and on, but honestly, almost every rounds are different. Instead, i'll give you this link :
http://tvtropes.org/pmwiki/pmwiki.php/V ... eStation13
A nice little gem in the previous page:
Ass Kicks You: Sort of inverted; it is possible to surgically cut someone's ass off and then beat them to death with their own ass.
Or surgically cut their ass off, grind it into meat, cook it into burgers and then feed them their own ass.
To see an ingame, 1:1 ratio map of the current version of the ship (NOTE : during halloween, it seems the admin decided to change the map to far different map, temporarily) :
http://autisticpowers.info/ss13/wiki/im ... om_map.png (you arrive on the blue shuttle at the top-left)
To download and play the game, you need the BYOND installation and being logged into their system:
To go to the prefered and most up-to-date SS13 servers, go the their wiki (unfortunately not as updated as i'd like, but a good start nonetheless) :
http://autisticpowers.info/ss13/wiki/Main_Page (nevermind their domain's name, it's better than their previous one, "Donglabs")
And click on their banner, on the lower-right section of the homepage.
And finally, on the why i've put quotation marks around 'cooperative' in the title.... You'll find out after playing a few rounds. Trust me.
Hope to see you there!