How about Custers Revenge (I have never played this) This has got to be the absolute worst game idea ever.
Quick Info:
A highly controversial game, consisting of moving a naked and heavily pixelated General Custer across the screen to have intercourse with a Native American girl (tied to a post) while dodging arrows. It is considered by some to have one of the worst premises ever in a game, and was ranked #1 on Gamespy's "Ten Most Shameful Games of All Time
Custer's Revenge - Wikipedia, the free encyclopedia