What's the best f2p mobile game you've played?

[Drain Bamage]

Fallout Shelter

 

[Headkicktoleg]

Either Brick breaker or snake

 

[TheGZA]

There is a good port of Nethack on teh Android store.

 

[snowbro]

Skyforce Reloaded

 

[Quipling]

Liberal Crime Squad