BANDAI NAMCO's licensed adventure RPG, One Piece Treasure Cruise, has surpassed 10 million downloads across Android and iOS since its launch in February 2015.
This figure is just for the English language version of the game available in 34 countries – the game is also available in Japan and Hong Kong.
To celebrate, the developer is throwing an in-game event that offers players free "MEAT", and is also having a competition on Facebook where players can vote for what characters they would like to see in the upcoming Sugo-Fest events.
Party for 10 million
It's these events that are the secret to One Piece Treasure Cruise's success.
Even a cursory look at the game's grossing ranks on the Google Play Store in the US, Canada, and Germany show an obvious trend of week-long top 50 peaks (followed by troughs) driven by the cadence of in-game events.