Cult Classic Video Games by MitchellWA

Question 4

The first game in this series, for Game Boy Color, was aimed at children; but poor sales and reviews forced the developer to go another direction, and the sequel involved the main character doing such "adult" activities as drinking Alka-Seltzer to relieve a hangover, fighting an opera-singing pile of feces, and asking the game's programmers to "fix a bug" in the middle of the game. Name the SEQUEL.

Conker's Bad Fur Day