Your First Steam Game

Half-Life 2 Classic :D.

Terraria, back when people were actually working on it

Learning with Portals promo

Garrys Mod.

Duke Nukem Forever.

Half Life 2 for buying an Ati Radeon 9800XT if I remember well.

Counter-Strike Anthology

Left 4 Dead 2, awesome game :D

Skyrim, I was a console gamer but now I think i'm a pc gamer

Orange Box.

Portal

Counter Strike 1.6 , included
Counter Strike : Condition Zero , and
Counter Strike : Condition Zero Deleted Scenes

Counter Strike source almost exactly a year ago

L4D2, i basically started on steam for that game, and now i cant live without steam. xd

Battlefield 2

Red Orchestra: Ostfront 41-45. Still the best one, to date

Portal, I think, too lazy to check.

LOADSA MUNY

Day Of Defeat Source.

How do you even know?

You had to register a Steam account when CS 1.6 was released, so that's my first Steam game I guess (or technically Half-Life?)

Counter-Strike.

super meat boy :D

Left 4 Dead 2.

Killing floor, and because of it everything changed.