"SEGA Wii game MadWorld will "spoil the family fun image" of the console, according to Mediawatch-UK, a British organisation that campaigns for decency in television, games and films.
"I hope the British Board of Film Classification (BBFC) will view this with concern and decide it should not be granted a classification," John Beyer, director of Mediawatch-UK, told the Mail Online.
"What the rest of world does is up to them. We need to ensure that modern and civilised values take priority rather than killing and maiming people.
"It seems a shame that the game's manufacturer have decided to exclusively release this game on the Wii," said Beyer. "I believe it will spoil the family fun image of the Wii.""