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Mortal Shell II Completion Companion logo

Walkthrough · Phase 1

Complete the Story, Defeat all Main Bosses, Find all Collectibles

Your first step will be to complete the game, defeating each of the main bosses and collect everything required for trophies. You can earn all trophies except the one for viewing Shell Memories in your first playthrough. You can do the first 6 main bosses through the Corrupt Gates in whichever order you like. The intended order is to complete the northern part of the map first, then the southern part of the map, but once you gain the ability to fast travel and clear corruption by siphoning 7 Ova in Marrow Keep you can effectively go in any order. Once you have defeated at least 5 of the 6 main bosses you gain access to the final area of the game through a stairway in the Ova room in Marrow Keep, which means you can fight the final boss without fully clearing all of the main overworld areas. Make sure to earn the three missable trophies during this step: 2 missables are in the very first section of the game: Mid Summer , No, You Still Can’t Win . These also can’t be earned in New Game+ anymore, because NG+ starts you back in Marrow Keep and skips the tutorial section. 1 missable Peter’s Perfect Parry is for fighting the main boss in the Prisoner’s Domain area and you can attempt thi

Roadmap overviewAll steps

The default order minimizes known lockouts. Goal branches insert relevant tasks; they do not create a second route.

  1. Step 01 Missable

    Accept Marigold's flower crown

    Do this during the opening walk to the first Shell. Skipping the interaction locks the trophy for this save.

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  2. Step 02 Missable

    Reduce the Tar Golem to minimum health

    The tutorial encounter does not repeat in NG+. Exit to the main menu before the loss sequence completes if you need another attempt.

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  3. Step 03

    Claim the first Shell, weapon and sidearm

    The opening sequence provides the first complete combat kit and establishes the three collectible lines.

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  4. Step 04

    Reach Marrow Keep

    Use Marrow Keep as the routing hub before committing to the northern and southern world branches.

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  5. Step 05

    Siphon seven Ova in Marrow Keep

    This unlocks fast travel and corruption clearing, which reduces backtracking between world branches.

    storyexploration
  6. Step 06

    Clear the northern world branch first

    The attributed roadmap identifies north then south as the intended order, while still allowing the six Corrupt Gate bosses in any order.

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  7. Step 07

    Sweep the southern world branch

    Use the map's incomplete-only preset to close Beacons, gear, Tarstones, fragments and keys before moving to the final area.

    storyexplorationcollectibles
  8. Step 08 Missable

    Complete Peter's Perfect Parry

    Attempt the Nameless Captive requirement late in the first run so the character is upgraded before the missable boss check.

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  9. Step 09

    Finish the core collectible sweep

    Close Shells, weapons, sidearms, Tarstones, Beacons and map fragments through the linked map and tracker views.

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  10. Step 10

    Defeat the final boss after the world sweep

    The final area can open after five of six main bosses. The completion route delays it until the unfinished core list is under control.

    storytrophies

Phase 1 operating check

Treat this phase as the working ledger for the first run. Start a local profile, read every missable label before the corresponding encounter, and open the attributed record when a step depends on a location or requirement. A companion check records your decision in this browser; it cannot observe the game save. Keep uncertain objectives incomplete until the current build confirms them, then use the tracker to review the remaining story, trophy, collectible, and exploration targets without counting shared objectives twice.

Before the final story transition, filter for incomplete work and compare that list with the map categories used by this phase. Export the local profile and make any game-save backup through the platform separately. The route order comes from the cited launch roadmap, so a record marked for recheck remains provisional even when it appears in the required path.