Adventurer Lara Croft has been hired to recover the pieces of an ancient artifact known as the Scion. With her fearless acrobatic style she runs, jumps, swims and climbs her way towards the truth of its origin and powers – leaving only a trail of empty tombs and gun-cartridges in her wake.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.