What was your first steam game?

Fallout New Vegas :)

Enemy Territory: Quake Wars
really good game, no longer available at steam :(

Half-Life 2, of course.

KF

My brother bought Half-Life Platinum Pack, and the years past by until the day I wanted to play too. So we fought and we brought ten thousands years of darkness to our city. And one day my brother decided he does not have time to play so I took the account and bought PORTAL!!---- sometimes when he has time he plays it two (we live in the same house).

Source Multiplayer Pack.

L4D2

Orange Box . 4 Years ago

Dota 2

Call of Duty Modern Warfare 2, even though I hate CoD... It was a gift! ;-;

Valve Premier Pack. 7 Years ago.

I got Orange Box like 4 or 5 years ago but just the day before buying it, I got HL2 DM with that promotion for free.

The orange box.

Call of Duty Modern Warfare 2 on my first ever account.
Garry's mod + Counter Strike Source on my current account.

First game installed: The Orange Box (My ex-BF gifted me a phisical copy)
First game purchased: Toki Tori

FEAR 2- Project Origin

AHHHHHHHHHHHHHHHHHHHHH DROP IT LIKE AN UGLY FUCKING BABY@!

The Orange Box, back when Steam was a lot uglier and a lot less reliable. It was still pretty great though.

Team Fortress 2 when it was Good, not that Free shit

Metro 2033

I believe it was the Source Multiplayer Pack (CS Source, DoD Source and HL2 Deathmatch). I spent a huge amount of hours playing those three games although they don't appear in my profile anymore :(

Civ V.

Batman: Arkham Asylum GOTY

December 7 2006, 1st game: Counter-Strike 1.6 (Retail) then I bought Half-Life Source