What game have you spent the largest total number of hours playing?

For me that game is definitely csgo, I got around 700 hours in it, that Is because it takes a entire life to be able to master that game and i love the competitive 5v5 Terrorist vs counterterrorist gameplay
-Competitive Gameplay
-Fun weapons
-Fun modes
-Easy and fun to play wirh friends

• Easy to learn but hard to master
  that are all the reasons I already got 700 hours in it and im gone hit the 1000 this year I think
  So now a question for the readers of this post>What game have you spent the largest total number of hours playing?