Smash-hit video game Fortnite may require its users to grant special security permissions before installation when it is released for Android devices.

The game’s website appears to include instructions to install the game directly to the device, rather than via the more common route of app stores, according to mobile developer blog XDA.

Both the Google Play store and Apple's App Store screen apps for security and compatibility - and the game is already available on Apple devices.

It is not clear whether the game will be available for download from the Google Play store but, unlike on iPhones and iPads, Android users can already download the software from elsewhere online.

→ READ MORE: Thousands of cheating Fortnite players infected with malware

Before installing software on Android devices without the Play Store, users must assess the security risk themselves and grant it access to their device.

The game, which is free to play, makes its money from selling in-game add-ons. Developer Epic Games reportedly made $126 million from the title in February of this year alone.

When apps are downloaded through the Google Play store, Google takes a 30 per cent cut of all subsequent revenue generated from the game's user.