Pop stardom isn't a zero sum game, but it is often built on rivalries, real or manufactured. A bit of bad blood can be monetised, whether it's Katy Perry versus Taylor Swift, Blur versus Oasis or the Beatles versus the Stones. In the gladiatorial history of rhythm-action games, it has been Guitar Hero versus Rock Band, two franchises that enjoyed such accelerated success there seemed to be no time at all between them minting a new genre and completely saturating the market. Since 2010, both titles have been lying low - presumably in great mothballs of fire, plotting their returns. This month, they reignite their old rivalry with two carefully stage-managed comebacks.
Rock Band 4
Publisher: Harmonix and Mad Catz