In terms of physical "paper" or printed materials included in the collector's sets:
In the bioluminescent depths of Pandora, a decade after the RDA’s first retreat, a curious discovery is made within the ruins of the abandoned Hell’s Gate. Kiri, wandering through the overgrown metal skeletons of the old human base, finds a corrupted data drive labeled avatar extended collectors edition 2009 108
The "Collector’s Edition" moniker is earned through its supplementary material. Unlike a standard "Extended Cut," this box set includes: In terms of physical "paper" or printed materials