Geometry Wars: Touch
Bonus Games

Most board games are too long and involved to be addictive like puzzlers and shooters, but they offer strategic gameplay and multiplayer experiences that you just can't get in short, fast-paced video games. Some of the best German-style board games have been released for the iPad (Carcassonne, Ticket to Ride, Puerto Rico and Catan) and are far more affordable as mobile apps than the real sets. If you have friends to play with locally or online, these are some must-have titles for classic game lovers.

"Geometry Wars" kicked off the launch of the Xbox 360 as a $5 Xbox Live Arcade download. The game was a massive success and helped usher in a renaissance for top-down twin stick shooters, in which players use one joystick to control a ship or character and the second stick to fire in 360 degrees. "Geometry Wars" married that tried-and-true mechanic to a unique graphical style that mixes waves of brightly colored fireworks-esque explosions and simple geometric shapes. The background grid pulses and distorts as waves of energy pass by -- pure visual eye candy.

A game rarely lasts more than a few minutes, and "Geometry Wars" is fun enough to keep gamers coming back time and again to improve their scores. There's variety, too: Like "Geometry Wars Retro Evolved 2" on Xbox Live Arcade, "Geometry Wars: Touch" on the iPad offers Deadline, King, Evolved, Pacifism, Waves and Sequence modes. They all offer something different, and "Geometry Wars" is a rare game in that it's fun to play for five minutes or two hours at a stretch.

As of this writing, "Geometry Wars: Touch" will cost you 99 cents in the iTunes App Store.