Mortal Shell 2 Achievements & Trophy Guide
Mortal Shell 2 ships with 53 achievements on Steam (mirrored as a PS5 trophy list). The completion path runs through all 12 mandatory bosses, Shell mastery and collectible sweeps.
The Slayer Seal warning
The single most important thing to know: activating the Slayer Seal execution-heal assist disables achievements. This sparked real backlash in launch week — Cold Symmetry told press they "didn't intend to lock everybody out" and are reviewing the feedback. Until a patch changes it, treat the assist as a trade: easier fights, no unlocks. Status tracked on patch notes.
Completion structure
- Story: boss and region milestones come naturally — see the walkthrough.
- Shells: upgrade-related achievements collide with the three-per-run cap — a full clear expects New Game+.
- Collectibles: Beacons, keys and map fragments each have tracked unlocks — the collectibles page covers types.
Achievements FAQ
How many achievements does Mortal Shell 2 have?
The Steam version lists 53 achievements. PS5 mirrors the set as a trophy list with a platinum.
Why did my achievements stop unlocking?
The most common cause: the Slayer Seal execution-heal assist disables achievements while active. This is the launch controversy the developers have publicly addressed — check patch notes for changes.
Did beta achievements carry over?
The Open Beta had its own limited achievement set, and select progress carried into the full game — but full-game achievements start fresh.
Is the platinum missable?
With only three Shells fully upgradeable per run, expect at least New Game+ for a completionist clear — plan Shell commitments before your first playthrough ends.
Achievement count verified (Steam):