Aliens vs Predator: Requiem is a 2007 third-person action game for the PlayStation Portable, developed by Rebellion and released under Sierra/Vivendi. Built as a tie-in to the film of the same name, it lets you play as the elite Predator “Wolf” as he arrives on Earth to clean up an Alien outbreak in the small town of Gunnison, Colorado—erasing Xenomorphs and any trace of their presence.
The main campaign is spread across a series of missions where you control Wolf from a third-person perspective. You stalk streets, forests, sewers and rooftops around Gunnison, using classic Predator tools: wrist blades, shoulder cannon, energy pistol, mines and more. Wolf can cloak, switch through different vision modes and “tag” enemies in first-person to lock on with ranged attacks.
A regenerating health bar and separate energy meter drive the combat loop, while an honor-point system scores you for fighting like a proper Yautja—rewarding clean kills and use of Predator tech and penalizing unnecessary human casualties. Honor points can then be spent on upgrading weapons and gear. Beyond the story campaign, a Skirmish mode challenges you to survive timed waves of Aliens, solo or in ad-hoc co-op with another PSP player.
The game follows the Predator Wolf as he responds to a distress call from a crashed Predator ship near Gunnison. Human authorities believe they are dealing with a simple disaster, but Wolf discovers Aliens spreading throughout the town—infesting the outskirts, sewer tunnels and public buildings.
Mission by mission, Wolf hunts down Xenomorphs, facehugger husks and any technology that could expose Yautja activity, while avoiding human witnesses where possible. His path leads through the forests and streets of Gunnison and finally into a Hive that has formed in the local hospital.
In the climax, Wolf rigs the hospital with mines, fights through dense Alien swarms and brings down the Hive structure. As human military forces close in and the situation spirals out of control, a nuclear strike is launched to contain the outbreak. Wolf escapes the blast, leaving Gunnison destroyed and the incident erased— at least officially.