Ridiculous Fishing

It's a dead-simple formula: cast your line, try to survive as far down as possible, get lots of fish, and then...shoot them as they fly in the air. Collect money, buy more gear, repeat. And yet, it's completely addictive, fun, and has a wonderful retro-ish design. Looks great on an iPhone, and works well on the iPad, too.

Price: $2.99 (universal app)