Most hours spent on one game?

Gmod with 2k hours ! Had so much fun with my friends on it, good memories

Minecraft, no hours-counter there, but no question about it

Don't even want to know the hours (years) I spent on World of Warcraft but its in the thousands of hours.

6 hours maximum cuz i gotta do editing and other stuffs

Fivem Roleplay 3200 hours

First insurgency 2500 hours

Arma 3 - 1.063 Hours
CSS - 1.632 Hours
Garrys Mod - 1.232 Hours
Ark and Space Engineers both - 469 Hours

umm, honestly, either minecraft, fortnite, or rainbow six siege. I've spent 6 - 7 years playing minecraft on pc, and a couple years on pocket edition. really funny, i placed a chicken egg thinking it would be chicken wings.

1000h in CSGO and 500h in GTA V

Sim City 4 sunk so many childhood hours in that game