To download the game manual, please visit the game page on http://marketplace.xbox.com and select "View Game Manual." As a commander sworn to defend humanity and galactic peace, your mission is to lead an elite combat team, technology and bio-experts on missions into alien worlds to stop the invasion of a brutal army. Download new systems and game worlds to experience new characters and exotic alien species, and discover new weapons, armor, and equipment for a whole new adventure! This game is non-refundable. For more information, visit www.xbox.com/live/accounts.