As Square Enix continues to expand globally, it’s starting to publish titles in Japan that aren’t traditionally “Square Enix,” like Modern Warfare 2 and games from its newly acquired Eidos subsidiary. According to Joystiq, the company has announced a new box label that will differentiate these “mature” Western titles from its usual slate of more innocent fantasy products – Square Enix Extreme Edges.

The Extreme Edges label will be used for Western-made games bearing CERO “D” (17+) or “Z” (18+) ratings, though Square Enix has yet to publish any CERO Z titles. The Z rating is legally age-restricted, and games bearing it are often not displayed in stores. Square Enix, however, will release Kane & Lynch 2: Dog Days in Japan on August 26; a game that at least seems “edgy” and “extreme” enough for the new label and probably worthy of the CERO Z rating.