A gacha game (Japanese: ガチャ ゲーム, Hepburn: gacha gēmu) is a video game that implements the gacha (toy vending machine) mechanic. Similar to loot boxes, gacha games entice players to spend in-game currency to receive a random in-game item. Some in-game currency generally can be gained through game play, and some by purchasing it from the game publisher using real-world funds.
The gacha game model began to be widely used in the early 2010s, particularly in Japan. Most of the highest-grossing mobile games in Japan use it, and it has become an integral part of Japanese mobile game culture. The game mechanism is also increasingly used in Chinese and Korean games, as well as Western games. Despite their ubiquity, gacha games have been criticized for being addictive, and are often compared to gambling due to the incentive to spend real-world money on chance-based rewards.