The last time we had a thread, it was 13 million.
Source: https://www.konami.com/games/corporate/en/news/release/20170131/?cm_sp=01-_-release-_-20170131-eKonami said:Konami Digital Entertainment Co., Ltd. announces that today the mobile game "Yu-Gi-Oh! DUEL LINKS" released on the App Store and Google Play on Thursday, November 17th, was downloaded over 25 million times.