What Steam Game Have You Spent The Most Hours Playing?

Sleeping Dogs 34 hours

Terraria: 143 hours. Sadly everything i did for the first 142 hours was lost D:

Counter-Strike 1.6 (545 hours)

Heavily modded The Sims 3, 56 hours.

Skyrim, 150+ hours, and I haven't gotten Dragonborn yet. I'd never even tried a TES game before that, but now I'm finally digging into Oblivion and Daggerfall (and Morrowind soon). Totally hooked. lol

ARMA 2, over 500 hours in it.

A.V.A - 1,094h.

Borderlands 2

dota 2 834 hours

WastedOnSteam.com

Garry's Mod.

Cod4: around 150hrs

Team Fortress 2 at 108,2 hours, but Torchlight 2 is closing in with 88,9 and skyrim on third place with 64,4 hours :3

So far, Ys Origin with 600+ hours played.

And no, that wasn't totally me playing. The game lacks pausing in boss battles, so to rest my hands during boss rush have to click off the window and it keeps ticking away at the time when I do that.

Garry's Mod. I really have 3,000+ hours, but steam reset my numbers or something. now it is only around 500 or so :(

I have spent every moment of my life on TF2. 1,785 hrs...

Team Fortress 2 and Binding of Isaac

Counter Strike 1.6 - 750 hrs
Dota 2 - ~400 hrs
Serious sam 3 - 18 hrs
Portal 2 - 17 hrs
L4D2 - 16 hrs

Dota 2 830 hours

Dota 2 151 hrs.

Virtua Tennis 4 7.3 hrs

Chivalry: Medieval Warfare 12.4 hrs

Dota 2 with 248.7 hrs.

Counterstrike 1.6, would have been close with Natural Selection tho...

Fallout: New Vegas

202 hours :D