This question likely refers to which gacha game players have spent the most money on. This, too, can vary based on time, region, and player trends. "Fate/Grand Order" has consistently been among the top-grossing mobile games worldwide, with players spending billions since its launch. "Genshin Impact" also had a strong start, generating over a billion dollars within the first six months of its release. Other games like "Puzzle & Dragons" and "Dragon Ball Z: Dokkan Battle" have also seen significant player spending over their lifetimes. Exact figures can vary, so it's always a good idea to consult recent financial reports or market analyses for the most up-to-date data.