Most of the time, Collector's Editions are reserved for big-budget fall releases, usually on the current generation consoles and PC. But Adventure Time is a bona fide cult hit, so WayForward's upcoming 3DS and DS game Adventure Time: Hey Ice King! Why'd you steal our garbage?! will get its own CE too.
Amazon (via Tiny Cartridge) is currently offering a Collector's Edition for $10 above the regular price. Bonuses include a SteelBook case, custom package design of the Enchiridion, a Monster Manual, a poster map of Ooo, and a replica stylus of Finn's Gold Sword.