While the Vic Viper might not be a household name on quite the same level as Mario or Master Chief, it still is emblematic of what makes video games great. This spacecraft and its distinctive split-nose design is the unlikely hero of Gradius, possibly the all-time greatest series of shoot-'em-ups. This style of game simply challenges you to survive wave after wave of enemies, by maneuvering to avoid them and their bullets while returning fire. The Gradius series' primary innovation was its customizable power-up system, though the games also featured some distinctive level design and excellent presentation quality. Now five games from the Gradius series--most of which have never been released before in North America--are available on one PSP disc, in the form of Gradius Collection. It's a must-have for any shoot-'em-up fan, but even those who weren't pumping quarters into arcade cabinets during the series' heyday should be able to appreciate the pure action and challenge these games deliver.