In-Fusio announced at the 2005 CTIA IT Wireless and Entertainment trade show that it would bring the blockbuster sci-fi shooter franchise to mobile phones as part of an exclusive three-year deal with Microsoft.

More than a year after the initial agreement and with no Halo game available for mobile phones, In-Fusio filed suit against Microsoft in U.S. District Court in Seattle last month, charging the company with refusing to approve game designs while still demanding payment for an exclusive license.

"In the last 11 months, Microsoft has approved no fully developed In-Fusio Halo game designs, ignoring and then refusing to accept In-Fusio's game design concepts with little or no explanation and leaving In-Fusio little basis to revise its concepts to obtain Microsoft's approval," the suit reads.