Although GTA Online is a massive success, Rockstar has long been known for its high-quality single-player adventures. The company used to dabble in other types of games, such as Midnight Club, but its reputation for quality most likely leads many fans to say Red Dead, Grand Theft Auto, Bully, or perhaps even L.A. Noire when they hear the company's name mentioned. Obviously, those first two are even likelier given the ongoing popularity of Grand Theft Auto 5 and Red Dead Redemption 2. A lot of its big names have never really dabbled in traditional co-op for its story modes, but Grand Theft Auto 6 could change that.