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Mortal Shell 2 Achievement Completion: Shells, Weapons, Maps and Bosses

A practical Mortal Shell II achievement route covering all 53 Steam goals, Shells, weapons, map fragments, Tarstones, Ova and completion checks.

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The retail Steam list contains 53 Mortal Shell II achievements. It separates story completion, Shells, weapons, sidearms, map fragments, Tarstones, Ova, Shell Memories and the all-achievements goal, so a completion route is easier when you track these as separate projects.

Mortal Shell II boss fight used for an achievement completion guide
Boss and exploration achievements should be tracked alongside the route, not left to a final blind cleanup.

The cleanest order

First collect normal exploration progress while following the story: Shells, map fragments, Tarstones and Ova. Next build one Shell to maximum bonding for Decked Out, and max one weapon for Over 9000. Leave “all” goals such as Shell Seeker, Lord of War, Guns. Lots of Guns and Bring My Ova Back to Me for a checklist pass after the map is familiar.

Three completion warnings

  1. 53 is the full Steam count. Hidden entries are still part of the list; do not assume a visible-name-only checklist is complete.
  2. Weapon and sidearm sets are separate. The achievements track them independently, and the patch notes do not publish a complete category table for every named item.
  3. Global unlock rates are snapshots. The percentage on a Steam achievement page changes as more players progress and is not a difficulty score.

Endgame checks

The story-completion achievement is This is Not an Achievement. Full completion is No Lifer. The rarest exploration goals in the checked snapshot include all Tarstones, all Shell Memories and all achievements, which is a reminder to log return markers rather than rely on memory.

Use the full Mortal Shell 2 achievements list for the 53 rows. Pair it with the map guide and Shell abilities guide so a missing item has a place in your route.