What was your first game on steam? GA ended.

CS Condition Zero in 2005

The second game I didn't get until 2008 which was Left 4 Dead 1. Then Killing Floor 1 and Left 4 Dead 2 in 2009. So 4 games in the span of 5 years and over 2,100 since then. :D

Portal when they gave it away for free, didn't even know steam existed before that^^

Starbound, three years ago)

Anna and I honestly don't remember why I got that, unless I was planning to do a Let's Play on it. I don't think I bought it myself, but there it still is.

Left 4 Dead 2 (DE) together with Killing Floor from steam store
Imported L4D2 1 month later from amazon UK to have it uncut. But I had to argue with steam support to really get it uncut...

I got Steam five years ago to play Portal 2, so this was my first game ever on Steam ^-^
It's time for a new Portal ;D

The Expendabros

Apparently it was Fallout: New Vegas Ultimate. I still remember that I resisted making a Steam account for a very long time (don't remember the reasons).

My first game on steam was Warface i'm pretty sure.

Skyrim

Half-Life Platinum Pack for CS1.6 on day one of Steam :D

Skyrim. At the time Steam was just an annoying extra program I had to install to make my game work. Ah the simpler times when I was still on dial-up internet. Ugh.

X-Com 3: Apocalypse. Who would have thunk it...

Left 4 dead 2 it was free on christmas uhahuahuahuhu evil:D

CS Source

I did get steam to replay portal 2, but technically my first game was "Trine 2 CE + Goblin Menace" from humblebundle cause I bought the bundle while I was waiting for my portal 2 key to be delivered

Saints Row IV

Skyrim!

DotA 2 and COmpany of Heroes :)

Overlord

Half-Life 2 Retail Collectors in 2004
My second was Orange Box 3 years later

Left 4 Dead Bundle

Borderlands GOTY

Dark Souls.
Then XCom.