The Rage Collector's Pack is exclusive to Game and Gamestation in the UK.
Inside the Collector's Pack are two Rage comics by Dark Horse that cover events prior to the game.
There's a 'Making of' DVD, too, as well as the digital contents of the Anarchy Edition of Rage.
The Anarchy Edition gives Double Barrel Shotgun and Fists of Rage weapons, as well as Crimson Elite Armour and a Rat Rod Buggy.
Game doesn't yet mention if the Collector's Pack costs extra.