What was your first steam game?

Don't remember which game I played first, but it was the Orange Box back then in 2007.

Skyrim

Css (+DoD:S and HL:DM, was the MP bundle)

TF2 if f2p games doesn't count then Dark Messiah of Might and Magic MP

first game i got was Dota 2 from survey, and first i bought was Summer Sale Indie Bundle Day Seven which included Avadon, Dungeons of Dredmor, Qube, Vessel, Zombie Driver...i was really interested in Qube and Vessel...

My first game was Metro 2033 when it was free, that is the reason why I have a steam account

I bought Magicka 2 years ago and thats what got me to start using steam.

portal 2 :)

Orange Box

Mount & Blade: Warband; bought it with a couple of friends & since then I'm addicted to steam.

DoD:S and CS pack soon after

I installed steam to play my Orange Box I bought from the store... it was a nightmare. I couldn't play because when I left the library to go to my Dad's place (no internet) I couldn't get online to play. I was frustrated on a level like nothing else

Left 4 Dead 2

Team Fortress 2

TF2

Natural Selection 2

hl2

Half-Life 2

Dead Space

Hm, I posted mine here.

cs 1.6

Lead and Gold: Gangs of the Wild West. Was a gift from a friend.

Portal

first game: free portal
first bought: serious sam random encounter