The following things change in Madhouse mode: (cheatcc.com)
Skilled players can try their luck playing through the game on Madhouse difficulty, and others can search the Baker family plantation to gather all of the hidden collectibles. (playiplay.com)
Death Parade, written and directed by Yuzuru Tachikawa, is a series that originally spawned from a short film entitled «Death Billiards» which was originally produced by Madhouse for the Young Animator Training Project and was released on March 2nd, 2013. (goodereader.com)