Developer Cold Symmetry and publisher Playstack have released update 1.000.015 for Mortal Shell II on October 23, 2026. The patch arrives as a follow-up to the significant Rotten Autumn expansion, primarily targeting menu-related lighting glitches and general game stability across PlayStation 5, Xbox Series X/S, and PC.
Menu and Lighting Fixes
The primary focus of version 1.000.015 is resolving visual inconsistencies introduced during the recent content rollout. Players had reported issues when toggling specific visual filters and lighting modes within the game’s interface. The update addresses the following:
- Fixed menu issues affecting lighting changes when using Night mode.
- Resolved interface bugs specifically related to Black Metal mode.
- Implemented general stability improvements to reduce instances of crashing.
- Applied various performance optimizations to improve overall frame pacing.
Rotten Autumn Context
This technical hotfix follows the Rotten Autumn update released on October 20, 2026. That major expansion significantly increased the game’s scope by adding 15 new dungeons, 10 character skins, and a dedicated photo mode. It also introduced an alternative soundtrack composed by Sakis Tolis of the band Rotting Christ. Update 1.000.015 ensures these new features integrate more cleanly with the existing UI, particularly the high-contrast visual modes.
Persistent Issues and Known Bugs
Despite the stability improvements in this version, several technical hurdles remain. Players using the PS5 Pro hardware continue to report inconsistent frame rate drops following the update. Additionally, Cold Symmetry is aware of specific level-design bugs where certain areas remain inaccessible or glitched:
- One dungeon located behind the scaffolding in the Hangman’s area remains bugged.
- A specific dungeon within the Doom level of Marrow Keep is currently non-functional.
- The player community has reported that two specific tarstones are currently missing from the game world.
For players tracking specific progression items, more information on the base game and its mechanics can be found on the Mortal Shell II Wiki. Cold Symmetry has not yet provided a specific timeline for when the PS5 Pro performance issues or the remaining dungeon access bugs will be fully resolved.
