What is the first Store Transaction entry on your account?

August 25, 2011. Borderlands GOTY, that could not have been a better purchase.

Call of Duty: Black Ops Retail

I regret buying it, but that what made me know steam, and now im buying only from steam. :)

I bought Worms Reloaded GOTY after that. Love worms games, especially Armageddon.

9 Jan 2008 -
NVIDIA Portal: The First Slice

Nvidia promotion.

First purchase was Deus Ex. My favorite game. I had it since it was released but I wanted a copy in steam too.

25 Dec 2006 - Sin Episode 1

22 Jun 2008 The Orange Box Retail
 

The Orange Box Retail 21 Jan 2009, first steam bought game: 26 Aug 2011 Borderlands GOTY ;)

31 Jul 2011 Free
Dark Messiah Multiplayer Complimentary (Later I received the single player, Unknown reasons O.o)

24 Dec 2012 4.99
Portal 2 (First game I ever purchase on steam)

2 Abr 2012
5,49€
Gotham City Impostors (when was not free xD)

YEAH! I can be considered new on Steam!

25 Oct 2011 - Battlefield Bad Company 2 Standard Edition

18 may 2008 - NVIDIA Portal: The First Slice

First entry was portal, which came free with my laptop, first purchase was half life 2 because I had previously gotten the orange box on PS3 and portal and half life had been the two that I liked the most on them.

(Of course if you asked me now I probably would have bought TF2 instead(did end up buying it like 4 months later), as the console version really does not hold a candle to it)

Mar 20, 2011 FEAR 2: Project Origin Retail

my first is steam - Complimentary

Bottom of the list - 26 Dec, 2012 (I'm new) - Mr. Torgues Campaign of Carnage (Gifted Borderlands2 beforehand)
But that was free and most of my games on Steam are bought from retails (GMG, GG, etc)
The first steam purchase tho was 28 Dec, 2012 - Counter-Strike Complete. :D
I miss sale. Sale pls come fast and take my money.

May 31, 2012 - Ys Origin - Purchase - $19.99

Yeah, bought it the day it came out and that was why I even got a Steam account in the first place.

Was this really my first?
Oct 31, 2011 - Free - Purchase - Dungeon Defenders Halloween Mission Pack
LOL

2 Jul 2007 $11.84 Purchase
Half-Life 2: Episode One

My first was the free portal too. I heard about it being free and I was playing the xbox version a week ago and really liked it so I took advantage of it. btw, I think it was free because of the celebration that steam came to mac. But the first real one was when I bought Counter-Strike Source

Half-Life 1 Anthology

Star Trek DAC Retail was my first retail game, the Garry's mod + Counter-Strike Source pack was my first steam purchase.

Apr 13, 2007 Purchase

Garry's Mod + Counter-Strike: Source

Actually bought was GTA IV. but i won HL2DM because of nVidia offer =P

The Orange Box - Retail. And my second and third entries are Lara Croft GameSpot Demo promo - retail and Left 4 Dead Bundle - Gift/Guest Pass.

The Orange Box was a reward from one of these "Get paid to ____" type places, where I just watched a bunch of videos and clicked on some ads until I had enough on my account to afford it. I was quite proud of my first Steam games. :) The demo was from a code given out to GameSpot members, which was only slightly earlier than the public demo for that game. And the Left 4 Dead bundle was a gift, obviously. :p