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

half life + cs pack

Fable the Lost Chapters was my first purchased game (though not bought from Steam). I believe I'd played the demo for Dungeon Siege III and Marvel Heroes 2015 before that.

HL 2

Dota 2 - Hardware Survey

steamdb

My first purchase was the Source Multiplayer Pack (Counter-Strike: Source, Day of Defeat: Source, Half-Life 2: Deathmatch)

Warhammer 40,000: Space Marine
on 2011... wow so long ago

Portal

Team Fortress 2

Afterfall InSanity Extended Edition LOL

Sniper Elite 2 :D

Deus Ex Human Revolution - bought a boxed copy but it still required me to install some shitty DRM client called Steam... So installed, finished the game and forgot about it... But 3-4 months later I won a boxed copy of Skyrim, and it also required some shitty DRM I already forgot about, but when creating an account it said there already is an account for this email, so I added it to the very same acct. And while I was still playing Skyrim, so launching Steam every day, my first Winter Sale happened... Long story short in one day time my game count went from 2 to 20 ;p The rest is history ^^

Call of Duty: Modern Warfare 3 was my first ever game on Steam, followed my CS 1.6 and Penumbra: Black Plague. Those 3 I always remember because they were all birthday gifts, but after that it was just some random stuff. :D

Portal Bundle

Portal 2. Retail copy. A bit more than a year later I bought Garry's Mod on Steam. Second game on my account.

Call of Duty: Black Ops Retail (19. Juni 2016 -was a present of my last girlfriend-)

Don't Starve

Europa Universalis IV

Portal 2... just created the acc for this game ^^

Indie Story Pack, though I really wanted just one game in it: Recettear

Capitalism, ho!

Civ 5

i thought mine was the orange box but actually it was half-life 2 episode 1. didn't really accept steam until civ v though.

Assassin's Creed® Revelations
A game I never played.

Mine was Half Life. Paid full price too.

Mafia 2. Bought it at a Best Buy, then found out later I had to be on Steam to run it. That was what got me onto Steam in the first place.

That was in 2011, and oddly enough I didn't even really play it until last year.