Highest game PlayTime!

I joined steam for the same reason!!

460 hours of Team Fortress 2.

The highest actual recorded time I have available is 14,400 hours which is 600 days. That's not a steam game though. I think I may come close to that with Gears of War 1 on the Xbox, but there's no way for me to see back and see my playtime sadly.

Nearly 470 hours- Rusty Hearts. Not because it's amazing or anything, but because it's an MMORPG and MMORPGs are EVIL. (Also while the game is patching it still thinks that I'm in-game. That includes the download process too. So at least 20-30 hours of "gameplay" were in fact downloading the latest update.)

about 1900 hours on tf2 plus another 600 while non-steam

The hours I have spent playing halo pc online ughhh from 2003 til now umm wow! If I only knew.

F.E.A.R. 2: Project Origin (~10K):
http://steamcommunity.com/profiles/76561198009314066
http://steamcommunity.com/profiles/76561198009680413

Lol I have 2200 hours in CS 1.6 since August 2009 and I'm called "no life"

Uh...Soldat, with ~2500 hours. Great times :D

The most played Steam game is MW2 with ~950hrs.

Got a picture now, exact time would be 14,045 hours I believe.

I have over 3k hours on Dungeon Defenders.

I'm fairly new to steam, joined in January this year. So far Left 4 Dead 2 is leading with 328.6 hrs on record.
God knows how many hours I've played it or any other game off-steam. Wasted 3 years of my life playing some mmos :<

In steam I only have 135 hours, but I only started playing this last Novemberish, so just about a year playing steam games. I keep idling to a very minimum, never leaving games running for more than a bathroom break.

I spend 114 hours on L4D2, and on WOW I spend over 2513 hours =D(+ a lot of hours I spend in a Cataclysm private server) Not plaing it anymore XD, how much our ppl spend in total in WOW official servers

if the time does not spend on dota, it is wasted for me. However; Dota 2 690.2 hrs on record

Highest game on steam is Dota 2: 349 hours. Highest outside of steam would be Warcraft 3. No idea how many hours were spent in that though as it was not tracked. Probably upwards of 600 hours though. (Alot of that being Dota 1)

I probably have about 20.000 hours (AFK time included, but Im guessing that thats about 25% of the total) on Anarchy Online, which I quit about 3 years ago. The sad thing was, that I did not even have complete sets of the best gear available.

My highest on steam is TeamFortress 2 with about 340+ hours..
But i guess my max (prob over 3k hours) would be ragnarok online years ago (conting dif. servers i played)

Ans also prob. 1k+ hours in Gunz online

437 of this rhythm game called osu!

highest on steam, only 150 hours, that's on terraria

Binding of Isaac - 78 hours.

Sam & Max might be a close contender if I could add up all 16 episodes together. EDIT: Around 75 hours in that.

Multi-player is easy, I want to see in single-player game.
TF 2 - 456 hours
Dragon Age: Origin - 938 hours

Dota 2 - 356 hours

88 hours on BFBC2 that I have since it's release, then BL2 which I have 45 hours on and then Payday the heist which I have 30 hours on.
Don't have much time or money to spend on games sadly

Killing Floor - almost 200 hours.

Bad Company 2 - 700 hours on Steam, more 100 on Origin.

Left 4 Dead 1 - Almost 300 hours. Plus all the days i played in Garena, before buying it on Steam.

Left 4 Dead 2 - ALmost 200 hours (i just have this one to play with friends, because i prefer the first game).