Most hours spent on one game?

I think i have over 3000 hours on garrysmod now got all the time achievments

It is Team Fortress 2. Spent more than 4000 hours.

5k hours in Counter-Strike: Global Offensive, but now i dont play anymore

The most time I have in any game is ~8.5k hours in CS:GO.
Second most is probably Garry's Mod, with ~2.5k hours.

It will easily be EVE for me. Been playing for well over a decade.

Minecraft - Idk how much, but im sure that its more 5000 hours

mine battlefeild 2-3-4 etc i wouldnt like to say but been playing for at least 6 years now at least

Of course my favorite game of all time, Arma 3 6000+

the most time I have spent on a game has to be either world of warcraft that i played for about 5 years lost a few gf over it or day of defeat fps

My game with most hours is Garry's Mod with 2600+ hours and then TF2 with 1000+ hours.