Most hours spent on one game?

Minecraft - 8000 hour More or less
MTA SA - 1500 hour
CS:GO - 3045 hour
CS 1.6 800 hour More or less nonsteam

Football manager, europa universalis or dwarf fortress.

Over 3000 hours on CS Source, don't know the actual time since steam didn't count hours when I first started playing it.

Gta 5 online, I was playing like 15 hours a day lol

Oh this is a good Question , but i thing i have many hourse on World of Warcraft and League of Legends but i thing the most game Time i have on Pokemon Red and Gold

Same. CSGO for me too (at least from the games on Steam which have tracked my hours, I have probably spent more time in WoW tbh). 1400+ hours.

In general, I probably have the most hours in Minecraft, in Steam I have the most hours at Garry's Mod, 1917 hours.

5000 hours on ark survival evolved, if you've never heard of it you will never understand the grind! It's intense lmao

4000 On Gmod. Most of the hours were spent loading into servers with my old computer and shit internet. The good ol' days.