Sequel to one of the greatest PC shooters ever, Crysis 2 offers console players their first taste of Crytek's unique shooter gameplay. Featuring futuristic war, gorgeous destruction and the chance to kick alien butt on the grandest stage of all, New York City, Crysis 2 is destined at the least to equal its predecessor, if not surpass it. Additional features include: challenging AI enemies in the single player campaign, 12-player support online, new and improved upgradable Nanosuit 2 technology and more.
Go to: http://www.origin.com/us/about
Click "Download Origin" (from the upper left corner)
Login into downloaded application
Install and start application, login with your Account name and Password
(create one here: http://store.origin.com/ if you don't have).
Redeem Product Code
From the "Origin" drop-down menu (upper right corner) choose "Redeem Product Code...",
enter your code and click "Next".
Download your Game
After successful code verification go to the "MY GAMES" tab and start downloading.