ELI5: Explain Like I'm 5

Gacha game

A gacha game is a type of video game that uses randomized loot boxes to give players rewards. When a player buys a loot box, they will not know what rewards they will get until they open the box. These rewards can range from helpful items such as coins, gems and weapons, to rare items like special characters, costumes or artwork. Players can use the items they receive to help them progress through the game.