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Hololive announced their first official smartphone game, Project DREAMS, during their Hololive 6th fes.
During the Hololive 6th fes. “Color Rise Harmony”, Hololive announced an official smartphone game currently called Project DREAMS. The game will feature official Hololive music that players can enjoy, and will also be released simultaneously worldwide, excluding some areas.

While it is currently unknown what type of game it will be, some fans speculate it will be a new rhythm game based on how it will feature Hololive songs.
Check out a new special anime video released by Hololive featuring iRys, Ookami Mio, Tokino Sora, Todoroki Hajime, and Vestia Zeta:
Project DREAMS is the first time Hololive decided to step into the mobile gaming market. However, the company has dabbled with video games. Previously, they had already made Holoearth, a metaverse video game that is currently in beta. Before the announcement of Project DREAMS, Hololive also announced an official English release of their card game, scheduled for 2025.
Hololive Project DREAMS has no official release date yet but more details will be available soon.