Pocket Tanks

Pocket Tanks is a turn-based strategic artillery, scorched-earth type game. Players alternately fire wacky weapons at each other hoping to hit the other and gain points. The game has a ten minute learning curve and has room for tons of strategy. There is a free demo version with 30 weapons, a deluxe version with 60 weapons ($15.99) and 11 expansion packs make it possible to have 165 different weapons(5-weapon expansions are free, but 15-weapon expansions are $7.99 each). The game is available here.