Most hours spent on one game?

Garry's mod topping at 1700 Hours
CSGO at 780

Could've had more on Garry's mod, but never had it on steam back in the days.

1Kish hours on GMod. Probably spent more on console but eh, can't check that.

Definitely "Elite". It ruined my first semester

Definitely Garry's Mod. 2600 hours according to steam. I spent way too much time on that game!

I spent around 5000 hours in garry's mod managing communities

12k hours on cs 1.6, including kreedz, surf, HnS, blockmaker HnS.. too much in this game.. sad its dead

200-500 hours (60% on mmorpg games/ 40% on FPS), but i'm play so much indie games with lower gameplay time

the most time I have played a game is a little over a 1000 hours in Rainbow six siege.

Well, 7000 hours on Garry's Mod

6000 Hours on Arma 3.

Yep.

I think its gta. I played 2800 hours, 2600 of them roleplay.