Eons of evolution proves that humans are pack hunters (and gatherers: ammo, better weapons, etc.) Although the civilized world and modern technology have removed the necessity for pack hunting -- the base, primal desire to hunt in a pack persists. Man needs to hunt, and pack hunting is better than hunting alone.When you are offline, Game Sentinel alerts you when your xBox® Friends are online. Scheduling game play isn''t always the easiest thing to do, that''s where Game Sentinel comes in. Game Sentinel allows you to monitor the"user status" of your xBox® Friends List and sends notifications to you. Game Sentinel will let you know when to jump onto xBox to join your pack in the hunt.Features / Functionality* Complete xBox® Friends List. Game Sentinel reflects your Friends List. * User Status of your xBox® Friends: Online / Offline status, Game Playing status and Voice On / Off status.* Sorting functionality: Ability to sort by Online / Offline status, Game Playing status, Voice On / Off status.* Up to the minute updates: Game Sentinel alerts you to changes in user status.System RequirementsHard disk * 7 MB of available hard disk space Registration * Registration on www.xBox.com (requires a .Net passport.) * Hold a current subscription to xBox Live®. * Have at least one "xBox® Friend" accepted.Operating System * Microsoft Windows® NT, 2000 or Windows XP or later