1) In the main menu of Aliens: Colonial Marines, select "Extras."
2) Select "Shift Codes" from the "Extras" menu. SHiFT requires Xbox Live Gold.
3) Choose "Sign Up." SHiFT requires users to be at least 18 years old.
5) Enter your e-mail address and desired SHiFT password (at least 8 characters, must contain uppercase, lowercase, and one number or special character) then choose "Sign Up."
6) Account created! An e-mail will be sent to the address you entered for confirmation.