All hope abandon ye who enter here

First game: The Binding Of Isaac; Last game: Gravity Badgers

my first non F2P game was the binding of isaac, and the last was Afterfall insanity dirty arena edition and even at 33 cents that game wasnt worth it.

Is there a way to check cause I can't remember

first one was gmod last one was rising storm

First game was Counter-Strike: Anthology (CS plus CS:CZ)
Latest is Prison Architect

NVIDIA Portal: The First Slice (It was from the nvidia bundle thingy) and my last one Strike Suit Infinity Early Access (which is weird, cause it's not Early Access, I bought it from GreenManGaming)

First game: Half-Life 2 Silver
Last game: Crysis

First: portal 2
Last non-bundle game: duke nukem forever

First game Amnesia: The Dark Descent. I installed steam only for that game and it was totally worth it. Now I'm waiting for Soma and then no more sleeping at night.

Last game Cloudbuilt. Bought during the sales i totally regret it. Well at least I bought Betrayer too wich I completely and shamelessly loved.

First: Counter-Strike 1.6
Last: some indie crap from bundle

Grats to your milestone. I'm 25 games short to my next one (1k).

First game: Grid 2 (AMD code)
Last game: Secret Files 3 (won here)

first [Call of Duty®: Modern Warfare® 2]
last [Rogue Legacy]

First: King Arthur 1
Last: Goat Simulator

First = Crysis Bundle
Last = State Of Decay + DLCs

First - Rome Total War
Last - Enslaved Odyssey to the West

First - Terraria

Last - Blockland + Can't stop laughing bundle (BattleBlock Theater & Castle Crashers + DLCs).

My first one was Counter Strike 1.6 (alongside with Condition Zero and it's free DLC). Last game was AoE2 HD's Expansion.

Thanks for the giveaway and congrats!
First game: Sanctum (still love it to pieces)
Last (non-bundle) game: FTL: Faster Than Light

Hmm my first paid games comes from Humble WB Bundle. Most recent purchase is the Season Pass for Bioshock Infinite.

First= DotA 2

Last= Dino D-Day :P

Man, some of you are making me feel old.
First game was Half-Life 1...bought at retail in a big box. See kids...back in the day we bought games in boxes bigger than a laptop and laptops were what we called things we put tv dinners on and tv dinners were what we called fast food but we made at home...anyways I actually bought it long before steam was a thing...10 years I've been on Steam...10 YEARS MAN. Sorry, I'm 29, us old men tend to ramble...
First: Half-Life 1 (which Steam for some reason now considers the Half-Life Platinum Pack)
Last: Titan Attacks

Just Cause 2 which I got with new graphic card(new PC). It was my only game on steam for a looong time, and in addition - my first current AAA game, because I had the previous PC for 7 long years. :) And that's why it's the 1st most played game on my steam account.

And the last game - New Weekly HB but I have redeeemed just 140 so far (great game).

i find it strange, that only some People have halflife2 or css as first game. i thought most of the steam users would have one of These two as first game