Alien Shooter is an top-down shooter video game from Sigma Team created in 2003. It is the first title in the Alien Shooter series to be followed by Alien Shooter: Vengeance. Alien Shooter has two expansions, Fight for Life and The Experiment. They each contain five new levels, including the conclusion to the alien shooter story.
1. Go to: http://store.steampowered.com/ and download STEAM client.
2. Click "Install Steam" (from the upper right corner)
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3. Install and start application, login with your Account name and Password (create one if you don't have).
4. Please follow these instructions to activate a new retail purchase on Steam:
Launch Steam and log into your Steam account.
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process.
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