Scoregasm is an incredible, variety rich shooter with a non-linear, branching paths style galaxy to explore. It's pretty, accessible, fun and really rather good! Blast your way through the galaxy's many varied levels and use your skills to change your route, find new levels, new enemies, unlock bonus challenge stages and fight the bosses to discover multiple endings!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.