Most hours spent on one game?

Path of exile - over 1500 hours of fun.

Really liked it, But now its getting boring and i have to move on.
Maybe to d2r

I spent the most hours in GTA V, unfortunately I don't know exactly how many hours I have because I played the most on a Playstation 4

Well, I think its Garry's mod, played it almost for 5k hours. Its pretty good game, has a large amount of modifications which you can use for rp~

currently FiveM the reason is because i like coding and doing MLO work on the game

3k + hours in clicker heroes. but is this gaming?
Otherwise I would say WoW takes the top spot

3000+ hours counter strike

Gta 5 has to be like months haha

like almost 4k on seige... yet my peak is only plat 1 :(

been on fs for abt a year now and already have 700