1. San Andreas
2. The Sims 4
3. Yakuza 6: The Song of Life
4. Hard Time
Can play 2d or 3d versions, both equally fun.
5. Punch Club
6. Gym Manager
7. Gym Tycoon
8. Galactic Gym: Fitness Center
9. Idle Fitness Gym Tycoon
10. Gym Simulator