MULTIPLAYER GAMES. A good friend of mine recently got a gaming PC (I've been PC forever) and this is his opportunity to buy TEN THOUSAND GAIMZ to play together! He already got BF3 off Origin on a sale.
I need your help finding multiplayer games on Steam during this sale. Ones that are still played by others and aren't broken online.
This includes everything. Classic server-based online shooters (BF3), online co-op against enemy waves (L4D), online "campaigns" with strangers (Blacklist/ Kane and Lynch/ etc..). Anything to be played together.
Offline co-op (like him and I rocking Saints Row 3) is also included, but to a lesser degree.