Grasshopper Manufacture's relationship with mobile game company DeNA is extending beyond the production of games for DeNA's Mobage service. Well, sort of. Today, the two companies announced that they're forming a joint venture called Grasshopper Social Network Service, Inc., and will work together to ... produce games for Mobage.

DeNA is looking to build up its catalog of exclusive games to help Mobage take off outside of Japan; Grasshopper is looking for "a new world of players" to experience the company's unique style.

Grasshopper's other recent, high-profile partnership is with Digital Reality. Together, the two companies are working on Black Knight Sword and Sine Mora for XBLA and PSN.