MIMESIS Major Update Dassen Launches October 26
ReLU Games' update adds new maps, monsters, scrap, equipment and traps, and evolves the mimicking AI; existing save data will not carry over.
ReLU Games announced on October 22 that the major update "Dassen" for MIMESIS will be released on October 26, 2026, at 11:30 JST, according to news.denfaminicogamer.jp.
The update adds new maps, monsters, scrap, equipment and traps. It also introduces equipment and costume slots, improves the UI, and evolves the game's mimicking AI, "Mimesis."
A one-year anniversary event will be held alongside the update. ReLU Games said existing save data will not be usable after the update is applied.
The logistics center mode will be paused for a while after the update, but players can still access it by selecting the previous branch.
Early access since 2025
MIMESIS has been available in early access on Steam since October 27, 2025, priced at 1200 yen including tax. The game requires a microphone to play.
Quick answers
When does the MIMESIS "Dassen" update release?
It is scheduled for October 26, 2026, at 11:30 JST.
Will my existing save data work after the update?
No. ReLU Games said existing save data will not be usable after the update.
How much does MIMESIS cost?
It is priced at 1200 yen including tax on Steam, where it has been in early access since October 27, 2025.