In 1991, Bobby Kotick and a group of investors had acquired the failing Mediagenic, the company that Activision had become from former leadership. Kotick instituted a large restructuring to pull the company out of debt, including renaming the company as Activision and moving it to Santa Monica, California. After bringing the company back to profitability by 1997, Kotick spent the next decade expanding Activision's products through acquisitions of an estimated 25 studios, which resulted in several successful series of games, including Tony Hawk's, Call of Duty, and Guitar Hero.