And Tapulous' music game series has now passed 20 million downloads.
US developer Tapulous has revealed that its Tap Tap Revenge series of iPhone music games is generating $1 million a month in sales, and has racked up more than 20 million downloads.
That includes the three main Tap Tap Revenge games, as well as presumably its branded spin-offs for artists including Coldplay, Metallica and Lady GaGa.
According to an interview with Reuters, Tapulous is now profitable as a company, and its games have been played more than 600 million times in total.
Meanwhile, a separate piece by music industry site Billboard says that the Tap Tap Revenge games are being played 2.5 million times a day at the moment, and that players have bought and downloaded more than one million tracks from the in-game store.
The article also claims that Tapulous is reducing the price of latest game Tap Tap Revenge 3 to free - although that's not yet reflected on the App Store.
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