Complete gacha (コンプリートガチャ), also shortened as Kompu gacha or Compu gacha (コンプガチャ), is a monetization model for video games. In the model, the game displays multiple items for players to randomly draw for a price similar to the Gashapon (or "gacha"), and a player who has obtained all of a designated set of items (or "completed" the set) can combine them to form a rarer item. The model is mostly popular with free-to-play social games on smartphone platforms in Japan.
The model was officially declared illegal by Japan's Consumer Affairs Agency in May 2012, citing the Law for Preventing Unjustifiable Extras or Unexpected Benefit and Misleading Representation (不当景品類及び不当表示防止法), after alleged investigation on the model's proposed resemblance to gambling.