This are the best list FPS games for smartphones, they are of multiplayer, single player, zombie genre and more even sci-fi genre to, FPS genre is growing stage for Android & iOS world. But its difficult to play this games on smartphones because touch screen arent suited for it neverthelesss gamers still play this genre games on mobile and its huge booming sector and their are powerful phones that can play this kinds of games like iPhone 6S Plus, Galaxy S7 edge, HTC 10 & Nexus 6P because they have powerful chip inside them like Apple A9 chip, or Samsung Exynos Chip or Snapdragon latest 820 Chip Which Have powerful GPUs to play.
So here is the list of Top 30 Best FPS games for iOS & Android, So Enjoy :).
Games Link :-
iOS :- https://itunes.apple.com/us/app/radiation-island/id923760656?mt=8
Broderland Pre Sequel :-
Android :- https://play.google.com/store/apps/details?id=com.tt2kgames.BorderlandsTPS&hl=en
Doom 3 BFG Edition