Lock, Load, & Face the Madness! Get ready for the mind-blowing insanity, as one of four trigger-happy mercenaries, taking out everything that stands in your way. With its addictive action, frantic first person shooter combat, massive arsenal of weaponry, RPG elements and four-player co-op, Borderlands is the breakthrough experience that challenges all the conventions of modern shooters. Borderlands places you in the role of a mercenary on the lawless and desolate planet of Pandora, hell bent on finding a legendary stockpile of powerful alien technology known as The Vault.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.