The L.A. Times reports that the 27-page contract outlines Bungie's agreement to develop four "sci-fantasy," action shooter games to be released every other year starting in 2013, under code name "Destiny." The agreement also includes DLC plans, with four expansion packs code-named "Comet" due in the alternating years, beginning in 2014.
The contract also specifies that the first game is a timed Xbox exclusive, created for the Xbox 360 as well as potentially for its still-unnamed successor, called the "Xbox 720" in the documentation. It could then later be released for PlayStation in 2014. In addition to the Xbox, later games could also be released for the PS3 or its successor console, as well as for PC.
In 2011, word leaked that Bungie was working on Destiny. The developer then confirmed at GDC 2011 that they were developing a MMO title.
The contract also specifies that Bungie is working on a Marathon title, based on its 1994 Mac sci-fi first-person shooter.
We have reached out to Activision to find out how much of the 2010 agreement is still planned, and will update if we hear back."