There was a time when the Angry Birds were the face of mobile gaming. Nowadays though, that just isn't the case. You need to scroll a decent way down the top grossing charts to spot an AB title. It's Angry Birds 2. It's in 39th, just underneath Cashman Casino Vegas Slots.
Since the first Angry Birds game came out at the end of 2009, we've seen 19 other titles released either bearing the Angry Birds name or set in the Angry Birds universe. Angry Birds 2 itself is already a couple of years old.
There have been cartoons, there have been crossovers, there was even a Hollywood movie. But now the likes of Candy Crush and Clash of Clans are far more likely to be mentioned in the same breath as the App Store than Rovio's creation. Which begs the question - where did it go wrong?