I'll also add in here Conquist 2. Great Risk-style game with like 8 maps, 4 modes, and lots of other stuff (if you don't have it yet). Also has same device multiplayer i think, i believe 'local' multiplayer on that one is same device. If you're looking for something for iPad as well, try Virtual Table Tennis Pro (i think it's a buck atm, not sure though) because it's ping pong on one device...(there's a free version for iphone with ads but no multiplayer atm)
No one said it yet so... Disc Drivin! The lite is full version with ads, so as I'm low on credits can't buy it, so if you wanna be cheap get free version, kinda like with friends series.