"Fortnite" is free-to-play, but players can make in-game purchases of cosmetic items and "battle passes," which offer exclusive in-game challenges which can unlock rewards.
The game is currently only available on iOS mobile devices, but is expected to roll out on Android this summer. It is also available on Xbox, Nintendo Switch, Playstation, and PC and Mac.
Sensor Tower said the game hit the $50 million (R678 million) mark in May, before rising to $100 million (R1.3 billion) in 90 days. It makes "Fortnite" the third most successful mobile launch ever, behind Supercell's "Clash Royale" and Niantic’s "Pokémon GO."
Sensor Tower noted that "Fortnite's" fiercest battle-royale rival, "PlayerUnknown's Battlegrounds" ("PUBG") was not included in the rankings for two reasons: Firstly, it has only been monetizing for 60 days, and secondly it has yet to hit $100 million (R1.3 billion).
Bluehole, the company behind "PUBG," filed a suit against "Fortnite" in May, claiming copyright infringement.
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