The company behind the popular multiplayer online videogame Fortnite has been hit with a class action lawsuit claiming that it induces minors to make in-game purchases that don’t have the approval of a guardian.

Fortnite is available for free for download on multiple game-playing platforms, but since 2017 players have been able to purchase virtual currency or “V-bucks” to buy things within the game such as virtual supplies, ammunition and costumes—called “skins” in the Fortnite parlance.