PC: https://store.epicgames.com/en-US/p/the-battle-of-polytopia-12fed6

Android: https://store.epicgames.com/en-US/p/the-battle-of-polytopia-android-2acf81

iOS (EU only): https://store.epicgames.com/en-US/p/the-battle-of-polytopia-ios-afc195