What was YOUR first game you got on steam? Small GA added.

It was the Odd-box.
Including Oddworld Abe's Oddysee and Exoddus, Munch's Oddysee and A Strager's Wrath.
It was a present from my brother. I used to play them on the Playstation many years ago. ^^

hacker evolution duality, i think it's not possible because first was definitely TF2 but hey it's valve ;)

Unreal Tournament goty I think. First that I purchased myself was KOTOR1.

Pat & Mat xD

VVVVVV

Apparently I activated a key for Gray Matter on the 7th of May 2014.

Counter-Strike 1 Anthology.

The game that got me on Steam was a physical copy of Portal, given to me for Christmas, 2008.

The first key I redeemed was for Defense Grid: The Awakening.

The first games I bought from the Steam store (all at once) were Universe at War: Earth Assault, Shadowgrounds Survivor and Shadowgrounds, AaaaaAAaaaAAAaaAAAAaAAAAA!!!, and Burnout Paradise: The Ultimate Box, which was during the 2009 Winter sale.

Counter Strike! XD

Counter Strike: Anthology

Saint´s Row 2 - nearly 300 hours on this game xD

Dota 2. Didn't even bother to play it though

First game that wasn't a CD Key was Half Life 2 Deathmatch and Lost Coast (they were free), but before I got that I activated the original Black Ops.

Super House of Dead Ninjas.

Fun game

Analogue: A Hate Story, apparently!

Total War: Shogun 2 Gold (US Box) Retail
Duke Nukem Forever (Steam store purchase)

Portal and I actually played it for an hour for the event, advanced maps are awesome !

Ashamed of myself since apparently Hydrophobia: Prophecy was my first game. I can't remember why i bought this game :|

Dota 2. Got 4 badges for playing it! ^__^

It was the Sniper Elite V2 and I'm still not played it. Shame...
Looks like this game was free at this time

Borderlands, and its still one of my favorites.

Football Manager 09 when they made it mandatory to get steam. I remember being very annoyed as I'd avoided steam on previous games as at the time it was seen as horrible invasive DRM.

Half-Life 2: Deathmatch and Half-Life 2: Lost Coast.
No clue when and how I got these games. I always thought Portal was my first steam game.