Fate/Grand Order: Waltz in the Moonlight/Lostroom will be available to download for a twenty four hour period on August 25, 2020. This offer is exclusive to Japan, as the Waltz in Moonlight app is currently not available in any other region. In addition to this, the official Fate/Grand Order website has teased additional costumes for Mash Kyrielight. [Thanks, Famitsu!]
With the secondary launch period of Fate/Grand Order: Waltz in the Moonlight, a new chapter will be added to the rhythm game as well. Those who have already been able to access to the app will be able to play through Act Two upon the completion of Act One.
Unlike before, downloads for the Fate/Grand Order: Waltz in the Moonlight/Lostroom will not be restricted to a set number, and instead will be open for a 24-hour period. The official website also mentions that more devices should be compatible with the app, so if you were unable to run Waltz in Moonlight before this new download period, your device may be able to after August 25.
Fate/Grand Order: Waltz in the Moonlight/Lostroom is a new Fate/Grand Order related mobile app. This new experience features VR-like segments where players can hang out with Mash and decide what costumes she will wear for the gameplay portions of the game. Waltz in Moonlight is a mostly a rhythm game and VR experience, but will have story segments penned by the Fate/Grand Order team.
Fate/Grand Order: Waltz in the Moonlight/Lostroom is available on iOS and Android devices to Japanese audiences.