The lawsuit revolved around Harmonix's technology being used in creating Guitar Hero III and royalties owed them for that deal. Harmonix, which created the first two GH's before publisher Red Octane was purchased by Activision, also claims it has not been paid for GH DLC, in-game advertising and other nitty-gritty details. Activision originally stated it had paid what it owed to Harmonix and "the claims otherwise do not have merit."
With Activision looking to drive the Guitar Hero franchise into
Read -- Viacom withdraws 'Guitar' suit
Read -- The full court docs.