What game have you played most (in hours)?

skyrim 500 std

Call Of Duty 4 (cracked) 4k h. (I can know 'cuz the Xfire show's XD) - PROMOD (is a mod), nothing of that shit and new shit where you press a botton and have 3 choppers 20 nuclear bombs and so on...

X3:Terran Conflict - 709 hrs... for steam games.
Prolly WoW... Kinda glad I managed to break that Addiction.

Wolf Enemy Territory, I can't prove it but I got on this a lot more than 4 000 hours, I got over 2 k recorded on my xfire, but I used xfire pretty late, so ET like 4-6 k hours...

Call of duty 4: Modern Warfare = 3000-4000 hours
Counter-Strike 1.6 = My whole life! (literally)

800+ hours CoD 2 (mostly recorded on xf)
200+ hours MW3 (on ps3)
200+ hours CS GO

CS 1.6 - 5222 hours on steam / same on nonsteam i think :D
CS:GO 4600 hours.

On Steam: Borderlands 2, 300+ hours.
Outside of Steam: League of Legends (shittons) or from old times Re-Volt, Civilization 1 and Quake 3 arena (only against bots, I didn't had internet connection back in the time) would score each probably into thousand(s)

On Steam,

Team Fortress 2 - 3,860 hours (definitely some idling but even without would be my most-played by far)
Civilization V - 853 hours
Europa Universalis III - 373 hours
Elder Scrolls V: Skyrim - 332 hours

Payday2.Css.DyingLight

The game i played the most was Action Quake 2, easily more than 3000h. Back in that time wasn't anything to record game time.

Now i only have AVA with 1200h in Steam.

Team Fortress 2 with 609 hrs.

Elsword with 143.
But I am pretty sure I have played some games more on consoles than that

Borderlands 2 382 h
Evolve 172 h
Don't Starve Together 109 h

2k+ hours in Dota 2 and counting.