Most hours spent on one game?

well, i got more than 900 hours on GTA V

300 on Gmod

573 on Arma 3

523 on CS:GO (and now he's free so no more launch from me.. trash game he became)

477 on PUBG

229 on Empyrion

454 on Rust

236 on ARK

134 on Scum ( i recommend that survival game)

476 on Space Engineers ( I recommend S.E for space simulation and as an Space minecraft with physics, but for the survival version i recommend Empyrion)

there's more but i will just end with Minecraft, i passed my childhood on it so.. probably the equivalent of entire month or a years playing, all the night, all the day except when i was sleeping