A change to the games configuration allows access to its debug mode (see tcrf.net). Players maybe use it to, for example, enable a free camera mode to explore regions of the game sets not accessible to the regular gameplay (unpublished content, possible lost storylines and locations).
There was some controversy, since the free camera mode also allows to observe two shower scenes of the female lead character from more exposing angles of view. Following a campaign by Sony, screenshots of such scenes were mostly removed from the web (see inquisitr.com ). It was expressly noted, that the visible body model does not originate from the actress.
The game also includes a cheat mode for testing of the game engine and selection of arbitrary chapters. There are some videos of the modes available on YouTube: Sanbox Sound Mode and Cheat Menu Overview.