Most hours spent on one game?

637 hours on Star Trek Online, back when it was actually good before perfect world bought it and ruined it

Team Fortess 2 spent over 3,500 hours in this game because I liked it

locked 1600 hours in Counter Strike Go, dont know how much time i spent in Call of Duty or Minecraft XD

csgo 600+ hour but my most played game is arma 3 with 8000+ hour

Garry's Mod - 758
Counter Strike Global Offensive - 2500
Minecraft - idk but i played this game while i was 12 y old. and im still playing lol

In more recent years, probably Splatoon 2 - i must have about 500 hours in that.

1spend 1800+ hours on DOTA2 , I am fucking loving this game

League of legends
+3K
with my friends ofc
I wish I did good things for my life instead

My daily before was around 10-16 hours of Mobile Games or PC Games. Since I started with my work, I went down to 1-4 hours of gaming time :3 :/

4k hours on Minecraft
2.5k hours on Skyrim
1.2k hours on CSGO
1k hours on Garry's Mod

I have other games with 1k+ hours but too lazy to remember right now