Salem

PayDay: The Heist
http://www.youtube.com/watch?v=5tqnJ1vXUX8
4 player online co-op
Some info on wheather or not to get buy the extra stuff; if one has they can host maps they can host and everyone can join, also extra weapons aren't useful until you are quite high level.
http://www.reddit.com/r/GameDeals/comments/18428c/payday_the_heist_4_pack_is_on_sale_on_amazon_for/

Castle Doctrine, you set up traps and then go try to rob others houses
http://www.edge-online.com/features/jason-rohrer-on-dealing-with-permadeath-in-the-castle-doctrine/

CockyBastard wrote:Castle Doctrine, you set up traps and then go try to rob others houses
http://www.edge-online.com/features/jason-rohrer-on-dealing-with-permadeath-in-the-castle-doctrine/

When I first saw this, I thought "Ugh... not another of these mediocre PvP games that just have players raiding each other constantly for leaderboard standings." Looks like I was quite wrong and it could be pretty interesting.

i heard about that... not so interesting i think

Castle Doctrine appeals to me with the rabid guard dogs, but the switch systems that can be set up - unless by-passable need to be switched in repetative patterns - which seems too annoying:
http://www.youtube.com/watch?v=OujbnaF8PkA
Having said that, this guy is very experienced at the high end - but like Counter Strike, once everyone gets there the game play is less approachable.
It is only $8 currently 1/2 price due to Alpha, which is very decent.

Payday looks like a nice break from Left 4 Dead 2, I will wait until it comes up on Steam Sale.
Which hopefully will be soon as Payday 2 is being released.