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Activation region: Global / Worldwide (RF and CIS Including)About this game:

You’re a marine—one of Earth’s best—recently assigned to the Union Aerospace Corporation (UAC) research facility on Mars. When an experiment malfunctions and creates a portal to Hell, the base is overrun by blood-thirsty demons. You must shoot your way out to survive.

RANDOM STEAM GAME FOR POSITIVE FEEDBACK!
PLEASE ATTENTION !!!
After activation, the game will forever remain in your steam library!

Game activation instructions:

1. If you have not installed Steam yet, then download and run the installer: http://steampowered.com/download/SteamInstall.msi
2. Create a new Steam account if you are not already registered there.
3. Log in using your Steam account through the Internet browser: https://store.steampowered.com/login/
4. Go to the "My Games" section and select "Activate via Steam ...", read and accept the Steam subscriber’s agreement and enter the key received immediately after payment.
5. After that, the game will appear in the "Library" section, and you can download it from steam.

In case of any problems or questions regarding the purchase or activation of the game, immediately contact me through the "Ask a Question" form.