Sega Genesis referenced the album Abacab in their blood code for Mortal Kombat. The extra ‘B’ is for Blood.
http://mentalfloss.com/article/62727/15-things-you-might-not-know-about-mortal-kombat
The aforementioned cheat code needed to allow the presence of blood and gore in the Sega Genesis variation of the game is >“ABACABB.” This combination of letters is a reference to Abacab, the 1981 album of Phil Collins’ rock band Genesis (which just >so happens to share a name with the gaming system in question).