Some good games to buy on steam?

i want a new steam game....i already have

-all the mysts

-all the hal-lifes

-gmod

-amnesia

-crysis

-tf2

-sims 3, sims medieval

-unreal

-l4d and l4d2

-portal and portal2

-magicka

-limbo

-serious sam 3

-metro 2033

-stalker

-alien sarm

-annnd skyrim



.....so none of those games above.Some good games to buy on steam?
Payday the heist is good
stop hating on cod and just play it :DSome good games to buy on steam?
portal 2
terraria i love that game and its not expensiveSome good games to buy on steam?
Crysis 2 is definitely a must-have! There isn't any other game like this; The graphics and game play are amazing. There are flaws in this game like buggy enemies and solid to boring campaign. The multiplayer is great too; in fact its the most interesting part of the whole game. I'm giving this game a 5/5. BTW, I can't believe that x-play gives this game 4 stars and Marvel vs Capcom 5 stars. The multiplayer in Marvel vs Capcom is laggy. Unbelievable!!
Call of duty? :3
saints row the third, terraria, VVVVVVV, and The Binding of Isaac (my personal fave)