The iconic Serious Sam brings his trademark relentless intensity to this bigger, bolder, more colorful sequel to the classic Serious Sam: First and Second Encounters! Tasked with rescuing the universe one bullet at a time against overwhelming hordes of time traveling enemies, Serious Sam must battle through thick jungles, murky swamps, frozen tundra, and futuristic cities to bring down Mental and his vile armies. Serious Sam 2 is a shot of adrenaline to the hearts of first-person shooter fans across the world. This is serious!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.