Your First Steam Game

It was Magic the gathering, Duels of the Planeswalkers

HL2 Gold.

Mafia 2, I've got it with a graphic card :3

Plants vs. Zombies. First non-pirated game I purchased for myself. And only because of achievements. And that was the moment I stopped pirating PC games.

Trine

The free Portal

tf2 :)

Terraria methinks.

portal bundle

the binding of isaac!

My first game was registering my Half-Life 1 CD-Key to Steam when it first launched.

11 Dec 2009
Counter-Strike: Source

CSS, Half-life 2 + DM.

February 2006: CSS

Empire Total War

Football Manager 2009

Portal 2.
sob

ATi promo, orange box, tf2, summer 2010

Only after CS:S I learned what a steam actually was.

call of duty modern warfare 2.

Portal.

Half-Life (incl. Half-Life, Opposing Force, Team Fortress Classsic, Counter-Strike 1.6, Deathmatch Classic)

TF2, when it was not free.

Half life 2 retail version.

My first game bought through steam store is the OddBox.

Aliens vs Predator