This Aliens vs. Predator CD Key can register through only in Steam game platform.
Games can be acquired from Steam download.

Languages: English, French, German, Italian, Russian, Spanish

Game Features

Developed at Rebellion by the team responsible for the original 1999 classic, in the all-new Aliens vs. Predator players have the chance to take the role of the three infamous species; the Colonial Marine, the Predator and the Alien.

Each of the three species has its very own distinct story-driven single-player campaign mode that interweaves with the campaigns of the other two species. Aliens vs. Predator will also feature unique 3-way online multiplayer, allowing gamers to pit the three species against each other in the ultimate battle for survival and for the right to be crowned the deadliest species.

On planet BG-386 a colonist mining group discovers an ancient pyramid containing a dark and horrible secret. Across the stars a race of warriors is alerted to the discovery of their pyramid and a hunting party is dispatched to ensure that it remains sealed at all costs, whilst deep inside the ruined pyramid a malevolent intelligence awakes from centuries of dormancy.

The Marine’s story is an incredible fight against the odds, and the horrors lurking in the dark. Beset on all sides yet armed to the teeth, the Colonial Marine represents humanity’s last stand with the firepower to fight back.

As the Alien, players will discover what it’s like to be the most murderous and lethal creature in the universe, with the ability to traverse any surface with awesome agility in order to get close enough to unleash its deadly teeth and claws.

A master of the hunt, the Predator grants the player a suite of exotic weaponry and equipment with which to stalk its unknowing prey. Earn the greatest honour by ambushing prey up-close and butchering them for a gory trophy kill.

How do I get the software? It´s simple, with Steam.
Steam is a game community where you can download games or interact with other gamers. Here you can download the latest games (beta versions),  search for friends, search for the best servers, get automatic updates, chat with friends (also ingame) and much more.
a) Download steam: http://store.steampowered.com/about/?l=english
On the left you are going to find the button: "Install Steam Now". Just click and a pop-up will appear, where you can download Steam.
b) Install Steam: Double-click on the downloaded file: SteamInstall.msi
Follow the instructions during installation. Important: choose the language steam will be available to you (just select the field in front of your country language selection). Steam will be installed...
c) Setup your Steam Account
After Steam installation a new window opens: "Open new account" or "log into existing account".
If you don´t have a Steam account, please click on "open new account".
Read the terms & conditions, accept bei clicking "I agree". Registering a Steam-account is for free!
Follow further instructions (setup account name and password).
After setting up your account name and password and providing a valid email address, your Steam-account has been opened. The program can be found in the tray-icon and is normally located on the right bottom of the task or symbol bar.
d) Register the game at Steam
The Steam window shows several tabs on top, one of the tab shows "Games".
Please click on "my game" and two new buttons appear on the buttom: "add a non-steam game" and "Register a product at Steam"...
Please keep your CD-Key available and click at "Register a product at Steam" and follow the instructions.
e) Download the game
If your key has been entered successful, the game will be listed below "Games" with the status "install". Klick on the game and the Download will start immediately. The game will be installed and it will start automatically. 

System Requirements

OS: Windows XP/Vista
Processor: 3.4 GHz Intel Pentium 4 or equivalent processor
Memory: 1 GB System RAM (XP)/ 2 GB System RAM (Vista)
Graphics: DirectX 9.0c compliant video card with 128 MB RAM (NVIDIA 7900 or better, ATI X1800 or better)
Hard Drive: 16 GB free hard drive space
DirectX: DirectX 9.0c