Aliens versus Predator: Extinction

Aliens versus Predator: Extinction is a video game developed by Zono Incorporated and published by EA Games for the PlayStation 2 and Xbox consoles in 2003. It was the first video game in the Alien, Predator, or Alien vs. Predator franchises to be released for either console. A real-time strategy game, it allows to the player to assume the roles of either the Aliens, Predators, or human Colonial Marines.

Gameplay
The game follows the precedent set by the previous video games Alien vs Predator (1994), Aliens versus Predator (1999), and Aliens versus Predator 2 (2001) of allowing the player to choose between controlling the Aliens, Predators, or Colonial Marines. Unlike its predecessors, however, which were all first-person shooters, Extinction is a real-time strategy game in which the player progresses their chosen race towards specific goals on a large map, using strategy and control of resources to gain more points than their opponents. Most of the buildings and other structures that the player can create are mobile, and the player is able to upgrade and add special abilities to most of their units in order to make them more effective in battle.

When playing as the Colonial Marines the player gains points in the form of credits by capturing additional territory, repairing atmospheric generators, and killing enemies. The player can call for additional reinforcements to be deployed at the locations of beacons placed on the map.

As the Predators the player acquires points by killing enemies and collecting their heads as trophies. The Predators have access to more advanced and more expensive technology than the other races, as well as a mobile headquarters. The player can call for new units to be deployed at most visible areas of the map.

When playing as the Aliens the player gains points by attaching facehuggers to enemy units in order to produce more Aliens and expand the Alien hive. The facehuggers are spawned from eggs laid by an Alien queen, which can move and attack but is stationary and defenseless while laying eggs.

Story
The premise of the game is that a group of Colonial Marines have arrived on a newly colonized world and discovered a colony of Aliens. The marines attempt to study the Aliens, unaware that a group of Predators has also arrived on the planet with the intention of hunting the Aliens. Minor skirmishes occur between the humans and Predators, escalating into a war. Meanwhile the Alien colony attempts to escape the battles and maintain its dominance over the other races.

When playing as the marines the player takes control of Bravo Squad, a group of elite commandos attempting to wipe out all threats to the local human population, discovering a Predator base in the process. The player is then assigned by a character named Dr. Kadinsky to retrieve two Alien eggs and a cocooned "praetorian" Alien. Battling Predators and hostile humans, the player eventually must attempt to rescue Kadinsky from the Predator base and then destroy it.

As the Predators, the player battles humans, Aliens, and other Predators in order to determine which Predator hunting tribe is the most skilled. Eventually the player must capture Kadinsky, and discovers that he has been creating a new type of Aliens known as the "K-Series", as well as an Alien/Predator hybrid queen. These Aliens escape and the player must destroy their hive by setting off a thermonuclear device.

When playing as the Aliens the player's task is to repel invading humans, use them as hosts, and escape with the Alien queen. The player then encounters Predators, and some of the Aliens are captured by the humans and used to create the K-Series Aliens. The player's Aliens must battle the K-Series and rescue the Alien queen from the Predators. The final battle involves the player battling against the Predators, humans, and K-Series Aliens.