Most hours spent on one game?

Dont laugh- Prison Architect.. .pure simple fun!

10K+ Hours in Gmod, its been a fun game especially with the variety of gamemodes and servers/communities.
Currently waiting on the release of S&box which is pretty much GMod but on an updated engine. should be a lot of fun

i played very much fortnite, and i have 3000 hours playtime. lmao

Rainbow Six Siege - 900 hours
Rust - 500 hours
CSGO - 400 hours

LoL played it for years since uts quihe addicting back then

wow i thougt i was an ultra geek with my 600hrs on rocket league... you guys are insane

Garrysmod 2.252.7 (2K) hour on steam

Garrys Mod, 4K hours used to game out during quarantine on one darkroom server.

garrys mod, sadly. I have hundreds of hours spread out between 120 games. Garrys mod happens to be the most played with 920 hours.

near the 1600h on csgo i can share my steam profile