Yakuza
While America embraces the M-rating, Japan has kept on making games with more youth appropriate content. Now, that's changing. Yakuza tells the story of a gangster framed for a crime, fresh out of jail, and ready to exact revenge.
Prowl the seedy streets of Tokyo and dish out double-fisted justice to lowlifes, and relax by hanging out in underground bars with women of the night.
Yakuza should journey westward sometime this summer.