Mortal Shell II Patch Notes: September Hotfixes and Known Issues

Official patch timeline through September 24: respec, adaptive difficulty, item fixes and the achievement issue still excluded from the latest hotfix.

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Mortal Shell II Wiki editorial team
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Official-source review
Last updated

Latest verified update: September 24, 2026

The newest entry in the official Steam announcement feed, checked on October 7, 2026, is Hotfix Live Now, published September 24. No later announcement appeared in that feed at review time. A new download alone does not establish new gameplay patch notes.

Update timeline

Date and official notesWhat matters when returning to the game
September 24: Hotfix Live NowFixes include Egon’s Stone dungeon/Gloom problems and the Seeking the Past achievement. Adaptive Difficulty gains tier indicators; Low Latency Mode adds NVIDIA Reflex and AMD Anti-Lag 2.
September 14: New Hotfix out nowExplicitly announced for PC, PS5 and Xbox Series. Addresses Proxima’s Biosampler lockup and Zhirelle interaction in NG+; Mether’s Severance becomes usable at the Genessa trainer.
September 5: New Update Out NowIntroduces optional Adaptive Difficulty and fixes Fragile Tarstone payouts and a Baghead quest lockout in NG+.
August 29: Week 1 UpdateAdds Shell respec and renewable Glimpses/Tarcores, plus daytime Beacons and revised riposte scaling.

Achievement warning: read the corrected notes

The September 24 post explicitly says Bring My Ova Back to Me was not fixed in that patch. Its promised later fix is not evidence that the fix has shipped. Do not confuse this exception with Seeking the Past, which remains listed as fixed. The post does not establish retroactive unlock behavior for an affected save.

Apply the right advice to your version

The September 24 announcement does not identify a public build number or a platform rollout list. Check your own client’s update status before relying on a fix. These summaries report developer notes; they are not in-game verification or a complete bug list.