Sega has come to the conclusion that M-rated games do not sell on Nintendo systems. I’m surprised it took them this long to figure out that M-rated games do not work on Nintendo systems. Unless it’s Resident Evil 4, that is. It would be nice to see them release those M-rated games that failed on the Wii to other consoles where the majority of players are above the age of 17? Both MadWorld and House of the Dead: Overkill had poor sales, which is one of the reason why they’re pulling away from M games on the Wii. Personally, I enjoyed  Mad World and would love to see that game on either the XB360 or the Ps3. The online matches alone would be worth the port.

Source: kotaku.com/5439632/sega-shying-away-from-mature-wii-titles