Infected

It's Christmas Eve in New York City! The mayor is throwing a wonderful tree-lighting ceremony, attended by many. He even has a disabled young boy to pull the switch to activate all the lights.

And as he pulls the switch, people notice that a lot of the crowd are decaying...

And New York City falls victim to a terrible virus that turns its victims into flesh-eating cannibals. This makes it okay to shoot them. The newly formed New York Bio-Hazard Team finds a sole survivor of an undead attack, one Officer Stevens. They find that Stevens is the only available person immune to the disease.

Even better, the normally invulnerable zombies explode upon contact with Stevens' blood. Things look brighter for New York suddenly.

A PSP game developed by Planet Moon Studios. For the book, see Infected.

Tropes used in Infected include:

Action Girl - The player, if one chooses a woman. Or if they select Rayne.
All There in the Manual - Gives some background as to why you need to shoot up zombies with your blood - they're invulnerable. They've tried tanks, flamethrowers, rocket launchers, and they keep on regenerating... not to mention the only other thing that can stop them is a nuclear weapon.
Bellisario's Maxim - Invoked by the manual, when explaining their rescue missions: "The civilians go into your... uh, 'backpack' (don't think about that too closely)..."
The Cameo - Slipknot and Chimera (the bands) are playable. So's Rayne.
Dead Baby Comedy - The Commissioner accidentally shooting a retarded kid and his psychotic breakdown, flashing back to when he was locked in a shit-stained cell by an angry grocer who caught him stealing.
The Ditz - The Commissioner, who accidentally shoots a retarded kid and manhandles chemicals almost constantly. Even the Director of the NYBT says the Commissioner's son is smarter than him.
Escort Mission - Comes in two flavors: Rescue missions, where you must collect civilians and lead them to a pickup site (later missions have the 'copters with limited seats, forcing you to head to different pick-up sites), and ones where you must protect civilians from zombies. The last mission was the latter with one civilian, the mayor's son.
Number of the Beast: Look closely at the blood paks used as ammo for the Vaccine Gun. "Type 666"
Our Zombies Are Different - See "All There In The Manual".
We Are Experiencing Technical Difficulties - See above.
Zombie Apocalypse - Duuuuuuuuuuuuuh.