Most hours spent on one game?

Either Battlefield 4 or Gmod I have 4000 on Gmod and BF4 I have 2000 on Xbox one and Probably the same on 360

1. Minecraft - 4000+
2. Counter-Strike : Global Offensive - 2500+
3. Garry's Mod - 1400+

Most of all I was fishing time pv, 4 years, to be more specific, was it worth it? I think yes, because I got to know many interesting people and visited many communication groups

This is quite embarassing but I would have to say Tibia. I'm not sure how many hours in total I spent, but I used to play it for like 6-8h a day from 2004 to 2012... Yeah don't judge me

Probably World of Warcraft, hours unknown, feel like I've lost months at a time wondering around Azeroth.

In my case:
World of warcraft: +1000 hours
Ultima Online: +1000 hours
Hearthstone: +3000 hours

Most time Ive put into a game would be rainbow six siege. Played at least 100+ hours.

roller coaster tycoon spent years and years playing this stupid game and still go back to it now days doesnt matter what version it is 1,2,3, or the newer titles i always go back to playing them

World of Warcraft with roughly 70 days of active played time.

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Ffxiv is a close second at 56 days played haha but then again its easy to sink a ton of time into mmos

League of legends is my most played game of all time, I think I'm really addicted