complete gacha; comp gacha
Abbreviation of コンプリートガチャ. A monetization mechanic in mobile/social games where a rare item is awarded only after collecting a full set of other items, often via random draws. Widely criticized as predatory and regulated in Japan.
See also: コンプリートガチャ
Complete gacha is a monetization system that became a problem in social games.
あのゲームのコンプガチャは、もう規制されて使えなくなった。
That game's complete gacha has already been regulated and can no longer be used.