Joemanji on 17 November 2007
I believe you have to include Rare in this list because Rare was practically inhouse at that time. I believe Killer Instinct is co-developped by Nintendo, the original released in the arcades in 1994, ported to the SNES in 1995 was by far the most mature and violent game ever published by Nintendo.
If that doesn't count: Tetris (most hardcore casual game ever)
