Mortal Shell II Database
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Official patch notes

Mortal Shell II October 13 Hotfix

A player-focused reading of the newest official hotfix: what its named fixes cover, what to check next, and what the notes do not guarantee.

Published Oct 13, 2026Official Steam announcementInteraction and dungeon fixes
Quick answer

Check the October 13 hotfix before retrying a listed issue

The October 13 hotfix is the latest tracked official update. It names fixes for aim and interaction, Tarstone EXP from player-summon kills, Shell and summon behavior, boss encounters, dungeons, Mether's Breath warning flow, and performance work. Match your installed version and the exact named symptom first; the patch notes do not promise that an unrelated save, platform, or community report is resolved.

Bug reports & known issuesAll updates
Official change list

What the October 13 hotfix names

Interaction, Shells & Tarstones

  • • The notes fix Black Needle throw and infused-stone cases where aiming or interaction was unavailable.
  • • They name Slayer Seal/Punch fixes, a Proxima weapon re-equip issue after cancelling her Shell ability, and a Gragu possession block.
  • • The hotfix also names Tarstones not granting EXP for kills by player summons, plus several summon-targeting and collision fixes.

Bosses, dungeons & progression

  • • The final boss has lower HP, doubled player cosmic-disease resistance, and more anticipation on its grab attack; the notes also name main-boss phase-change fixes.
  • • Droeg hitboxes, Bor lock-on/Biosampler interaction, Monolith with Proxima Biosampler, and Orrem's triple slam are specifically listed.
  • • Players in NG+ can collect three extra Ovas in the final slice dungeon; The Last Siege enemy count and two dungeon-loading cases are also named.

UI, stability & performance

  • • Mether's Breath now has multiple warning prompts, and backing out of its second warning no longer soft-locks the game according to the official notes.
  • • The post lists camera-collision work, environment/collision fixes, and optimizations including rebuilt PSO caches and world HLODs.
  • • These are named patch changes, not proof that every save, platform, performance setup, or player report is resolved.
FAQ

October 13 hotfix questions

What is the newest official Mortal Shell II update tracked here?

The October 13 Hotfix is the newest official Steam announcement currently tracked on this site.

Did the October 13 hotfix address interaction problems?

It names Black Needle throw and infused-stone aim/interaction fixes, plus Mether's Breath warning-flow fixes. Check your installed version and exact symptom before treating that as a universal recovery.

Does the patch guarantee better performance?

No. The announcement lists optimization work and rebuilt caches, but it does not publish a benchmark or a universal performance gain.

Where should I report a symptom that still occurs after the hotfix?

Use the Steam Bug Reports forum with your platform, version, location, reproduction steps, and relevant screenshots or video.

Source of record

Developer-posted hotfix notes

Use the official Steam announcement list for the complete wording and any platform-specific follow-up.

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