The court case between Activision and the former heads of Call of Duty studio Infinity Ward has yielded new information on the publisher's deal with Halo creators Bungie.

The Los Angeles Times reports the 10-year deal requires Bungie to create four "sci-fantasy, action shooter games, with the first launching in fall 2013.

Details of the partnership were revealed through a 2010 contract unsealed as part of Activision's Call of Duty lawsuit.

The other three games of the project, code-named "Destiny," would release every other year, while downloads nicknamed "Comet" would be available in alternating years beginning with 2014.

The contract also states the first "Destiny" title would appear on Xbox 360 and its successor before branching out to the PC and the eventual successor to Sony's PlayStation 3.

Activision and Bungie announced their 10-year deal in 2010. It gives Activision exclusive rights to publish the games, and Bungie retains all rights to the intellectual property.

"Our Constitution remains unchanged," says Bungie in a statement released at the time the deal was announced. "We are still Bungie, still independent, and now we are free to bring our stories to an ever bigger audience."

The contract also revealed plans for Bungie to work on a follow-up to their classic shooter Marathon, released for Macs in 1994.