Most hours spent on one game?

I spent 100 hours on gta5 LOL

I have nearly 300 in Hearts of Iron 4 I think. New Vegas may be higher but I don't think so.

120 hours in Elden Ring for platinum

Resident Evil 2 Remake because I used to speedrun it

Can't lie, iracing stands out by about 1000 hours

Sadly fortnite but that’s because I played kt when I was a kid I have about 4,000 hours played on fortnite just on console

Over 2200 and counting on Destiny 2

easily csgo almost 3k hours

Like 500 in Rocket League. But that’s not even that much

4000 hours CS and 1k on rust