VGFacts

The many of the game's design elements were inspired by Grant Morrison's Arkham Asylum: A Serious House on Serious Earth. Producer Nathan Burlow stated the narrative and atmosphere of the BioShock and Eternal Darkness influenced the design. Director Sefton Hill said the influences of the gadgets and abilities that can be combined and used in different ways in The Legend of Zelda and Metroid.

Sources:
http://www.gamasutra.com/view/feature/13...php?page=2
http://www.comicbookresources.com/?page=...e&id=20931
http://www.comicbookresources.com/?page=...e&id=20344