Infected is a zombie-killing, third-person action game for mature audiences. With so many Resident Evil games and knockoffs, it seems unnecessary for yet another in the genre. Like other games in the genre, the player is a multiple-weapon toting cop out to save civilians from infectious zombies — but that's were the similarities end.

Infected uses an inventive killing system, where zombies must be weakened using traditional weapons and then killed with blood darts. Enemies start out yellow, turn red after the first round of weapons, then explode with gusto when finished off. Any other zombies in the area are weakened by their exploding neighbors, creating opportunities for mass elimination and power-ups. The controls are easy to master and effective, with an excellent auto-targeting system.

The graphics and audio are adequate, but far from pushing the PSP's abilities to the limits. Some will be disappointed by the lack of mission variety. Infected is not perfect, but it doesn't take itself too seriously and instead offers straightforward action and humor that give the zombie-shooting genre a fresh perspective. This title is engaging, memorable, and even fun to replay several months later.