Best ipad app game for grown ups?

[mydaftlass]

I need a new game to play.

I don't like platform style games very much.
Candy crush was fine for a bit but I'm so over it now.
I used to live playing world domination games on PC (settlers, civilisation).
I would probably like minecraft but the graphics style annoyed me.

Any recommendations?

DS plays Clash of Clans. He is 14 and geeky (plays space engineers, reads Private Eye etc). You can join with other people you know to increase the strength of your clan.