I love the attention to detail in how throughout the game's timeline, you can see Waylon Jones' condition getting worse and worse. Very smart. : r/ BatmanArkham
Batman: Arkham Origins - BTAS Killer Croc by DerpstonPDerp on DeviantArt
Secrets and Spoilers - Batman: Arkham City Guide - IGN
Killer Croc - Batman: Arkham City Guide - IGN
Batman: Arkham City - Easter Egg #31 - Killer Croc in the Iceberg Lounge - YouTube
Batman Arkham City - Killer Croc Easter Egg - YouTube