There are 3 games I must have on all my phones, and one more game I must have if there is space left for it.
Clash of Clans, The Walking Dead: Road to Survival, and Walking War Robots.
WWR has some of the best graphics of any Android game.
The game Ib like to have if I have space v is Real Racing 3. It plays beautifully on my S7 Active. Plus, I have 32GB, so I can have them all on my phone at once now.
I also enjoy Nitro Nations.