I can't stop playing this one! You switch off being a japanese or american soldier trying to gain control of all the flag points (five) on small pacific islands. There are only a handful of maps, and a handful of strategies, and it's all so very simple, and that's exactly what makes it fun. You can run around shooting, or get in a tank, or a jeep, or even airplanes ... and for extra fun you can jump out of your airplane and parachute onto the other teams' positions.
This is my new laundry game. It's easy to just pop in and enjoy a few minutes of mayhem between loads of laundry.