All hope abandon ye who enter here

First game is Fallout 3 and the last game would be Eleusis xD

First: Left 4 Dead 2 <3
Last: Brothers

Counter Strike 1.6 as a first game. Brothers - A Tale of Two Sons as the last game.

First would be Portal (Purchased 14 May 2010) and the newest one would be Cinders (according to my Licences + Subscriptions).

Congrats :3

I've reached 300 games and I want to make a thread as well, I'll do it as soon I find some time :D

My first game was Portal 2 and my last one was A New Reckoning.

First purchase Portal (it could be Half Life1 many years before 2010 portal.. but not interested in registering my copy online XD)
Latest full game and not dlc.. as gift/retail -> DIno D-Day XD, directly from steam-> Retro City Rampage

My First game I got on steam was Portal: The First Slice redeemed on 14 Jun 2008 from an nVidia bundle I got, But the first game I actually bought on steam was the Left 4 Dead 2 - Four pack. the last Game I got was the Quake 2007 Collection on 29 Jun 2014.

Most of you are youngsters ;) 8 years of service here :)
First 3 games I got on Steam simultaneously:
Counter-Strike: Source
Red Orchestra
The Orange Box
(I was very sceptical about Steam back then, but I got those as a payment for my first webdesign)
Last game: The Few
(I bought the game in preorder over a year ago, but now I got steam key for it as a thank you for supporting the developers).
Last game (bought): Dead Space 2

First: Terraria
Latest: Elder Scrolls Anthology Steam Key (Morrowind GOTY, Oblivion GOTY, Skyrim Legendary all-in-one)

My first game I bought on steam: Civilization V
Last one was Bloody good Time

MY first game was sleeping dogs with all dlc
My last game is Shufflepuck cantina deluxe , at least for now debating between buying reboot 5.0 bundle tonight o:

my first was Half-Life 2. had to install steam for it back then, when it was still sparkling new xD

newest one is 100% orange juice :D

First: Crysis

Last: To The Moon, which someone gifted me. My last bought game was Fly'N.

TF2 F2P master race here... the first thing i bought was Magicka at 75% i remember loading money on my paypal account (back when this was possible) then adding it to my steam wallet... i bought a 50 cents pyro pack for TF2, and magicka...
The last game i bought was Super house of dead ninjas.

First: The Witcher: Enhanced Edition

Last: Brothers - A Tale of Two Sons

First. Garrys Mod, always wanted to make pictures.
Last was a gift, Serious Sam 3 BFE

first: orange box

last: defy gravity

First game: Garry's Mod
Latest game: Bioshock

First = Half-Life Episode Two Pack (Retail)

Most Recent = Duke Nukem 3d && Shadow Warrior bundle