There is a sale on the PS store in my country, where they are selling these games real cheap, the options are Battliefield 1 Revolution, Metal Gear Solid V Definite Experience, or Injustice Gods Among Us 1 Ultimate Edition, I only have enough left on my account to pick one?

First person shooters

It depends, games that are too easy can be annoying a good balance is nice

Batman Arkham series or Spiderman 2

By adding more side activities like in San Andreas, you could go to the gym and work out, also learning fight moves in Martial Art schools, improve the combat, maybe set the game in a new location, and play as one main character not three