Guitar Hero Encore: Rocks the 80s for the PlayStation 2, which was released in July 2007, was the final game developed by Harmonix for the series. Though it was produced after Harmonix were purchased by MTV Games, it was part of their contractual obligation to complete the game. The game, as suggested by its name, features tracks primarily from the 1980s.
what was the last guitar hero game developed by harmonix
Guitar Hero Encore: Rocks the 80s