MONMUSU

MONMUSU launched as a free-to-play idle simulation game on May 11, 2018. In the months following launch, the developer shipped a series of feature updates adding new mechanics, UI improvements, and balance adjustments — Version 1.10 on May 28, 2018, Version 1.11 on July 30, 2018, and Version 1.12 on January 8, 2019. After that, developer activity dropped to pure maintenance: a save-file fix in Version 1.16 on July 27, 2021, and most recently a Unity security vulnerability patch on October 15, 2025 that explicitly noted "there are no changes to the game content." No major content has ever been released post-launch. No future content has ever been announced. No DLC exists. The developer has not signaled any intent to add new content. The October 2025 security patch confirms the developer still maintains the game technically, but this is routine upkeep rather than content development. The game appears to have shipped as a complete product and received its final content additions with Version 1.12 in January 2019.