What was your first steam game?

Left 4 Dead

Portal, got it during a promotion on Steam when it was distributed for free about three years ago.

Counter Strike 1.6 + rest od the bundle of 8 games :)

Counter Strike.

two words.. Orange Box.

Left 4 Dead 2 09/01/2012

Call of Duty: Black Ops back in 2010.

Warhammer 40K: DOW2 + Chaos Rising Sept. 2010

Supreme Commander 2

Half Life 2 Episode Pack, back in late '07. No, I didn't play the episodes first so calm your jive, turkeys.

Terraria

Modern Warfare 2

Terraria, L4D2 soon after.

W40k: Dawn of War 2 Complete Collection

super street fighter IV arcade edition

Terraria

Magicka

CS source, second chime lol

The first i bought was DE:HR.

css ;)

Counterstrike Source of course!

CIVILIZATION 5

Half Life 1 it forced me to use Steam, which was really awful DRM at the time. It wouldn't let me play from my CD but made me download from their server which took me more than a week.

Post Apocalyptic Mayhem.
Am I part of the minority that did not get a Valve game.