Battle of the Bulge
Sky Gamblers: Storm Raiders
I like:
Osmos One of the coolest implementation of Newtonian physics I've ever seen.
Heist...albeit on Mac/iPhone. I've yet to buy an iPad.
There are
so many it's hard to wade through them all.
This looks like a good list:
www.digitaltrends.com/mobile/best-ipad-games/