A game filled with heavy combat action, fast-paced tactics and decision making, Space Siege is an all-new science fiction themed action-RPG being developed by Chris Taylor and his talented team at Gas Powered Games, the creators of Dungeon Siege I & II and Supreme Commander.Go to: http://store.steampowered.com/ and download STEAM client
Click “Install Steam” (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don’t have).
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.
After successful code verification go to the “MY GAMES” tab and start downloading.