What was your first steam game?

Left for Dead 2.

Terraria

Counter Strike Source

Duel of the planeswalker

Puzzle Agent. It was free with Eets with this iOS app. But I didn't really get started until I won The Walking Dead in a contest.

Counter-Strike

I got the Orange Box back in 2008.

cs 1.5

CS 1.6

Counter strike source

Counter Strike Source

Terraria :D

Terraria which also the reason I started bothering with steam and stop pirated games. That little game changed my life :D

Dota 2 and then Garry's mod

Half-Life 2 Game of the Year Edition, complete with Counter-Strike Source, HL2 Deathmatch and HL: Source. I only got it on Christmas 2005 just so I could play GMod but I ended up actually enjoying the games. Such a long time ago.

One version of the Half-Life 2 GOTY edition, which game with HL2, CS:S, HL:S, and the deathmatches. It was a sweet retail pack.

ROCKSMITH !!!

CS 1.6

Overlord. My latest addition is ironically enough it's sequel. Picked up from the GMG sale

Nexuiz

Portal 2. One of the only 3 games I've actually bought for steam.

Orange box :)

Half Life 2.

Team Fortress 2

Left 4 Dead 2