Mortal Shell II Shells and Achievements
Mortal Shell II Shells and Achievements

Update Datetime: 2026-09-14 13:49
SHELLS AND ACHIEVEMENTS
Mortal Shell II Shells and Achievements
All eight Shells and how they play, how bonding works, which to invest in, Night Mode and the Slayer Seal, and a plan for all 53 achievements.
Shells
8
Bond tiers
4
Achievements
53
Hidden
16

Shells are the heart of Mortal Shell II. The store describes the forgotten Shells of eight lost warriors scattered through the world, each with innate abilities and a story told through memories. Shell names below match the official achievement list. Ability descriptions and the ranking come from GameRant, so treat the ranking as one outlet's opinion. Achievement conditions are from the official Steam list, where 16 of the 53 are hidden.

1 The eight Shells

Tiel
Stealth and burst damage. Short invisibility, invisibility on perfect dodges, and a heavy Shadow Strike. Found early.
Proxima
Tanky, with built-in damage reduction and a Biosampler hook that applies lightning. Can harvest samples for gold. Found early.
Eredrim
A knight built for break damage. Shoulder Bash and a blinding shockwave push bosses into riposte range.
Smert
High risk. Miracle stops time at the cost of half your health; power grows at very low health.
Genessa
Summons phantom doubles that copy your attacks for very high damage, but is fragile. Tied to the Sester Censer.
Gragu
Exploration specialist. Revered Heart replaces the usual healing and refills by defeating enemies.
Sariel
A complex tank using Curse and Pain to nullify and convert incoming damage.
Lazlo
Heated armor that releases a shockwave and can overheat to apply burn, at the cost of temporarily losing the armor.

2 Bonding, Glimpses and memories

You strengthen a Shell by bonding with it at the Shellkeeper, spending Glimpses. GameRant describes four bond tiers, with the fourth costing 30 Glimpses for a Shell such as Sariel. Higher tiers unlock upgrades and better core stats, and GamingBolt adds that bonding also reveals more of each Shell's story.

AchievementCondition
Decked OutReach the maximum bonding tier for a Shell at the Shellkeeper
Haunting TimesWatch your first Shell Memory
Seeking the PastWatch all Shell Memories
Shell SeekerUnlock all Shells

3 Which Shells to invest in

Glimpses are limited, so investment is the real decision. Guides estimate enough for two or three fully bonded Shells per run.

GameRant tierShells
SGenessa, Tiel, Smert
AEredrim, Gragu, Proxima
BSariel
CLazlo
A practical first-run plan
Start with Tiel or Proxima, the two Kotaku recommends picking up early. Proxima is tough for exploring, and Kotaku highlights its third-tier skill for making enemies drop sellable items, which eases the late-game shortage of coin. Add a second Shell that fits the way you like to fight, and leave Smert for when you are confident, since GameRant calls it the highest skill ceiling in the game.

4 Night Mode and the Slayer Seal

1
Find the Gloombound Flame
In Fainweald, head down from the Widow's Overlook beacon to a graveyard guarded by the Great Arbiter of Flesh.
2
Give it to Thestus
At the Marrow Keep, this switches Night Mode on.
3
Play for the rewards
Enemies gain much more health but drop more Gloom, and some encounters, merchants and secrets change.
The Slayer Seal disables achievements
The Slayer Seal, on a red throne at the Marrow Keep, heals you and restores Resolve on ripostes and lets sidearms deal break damage. Kotaku and GamingBolt both warn that equipping it turns achievements off. If you are chasing the full list, leave it alone.

5 Achievements by group

GroupVisible achievements
ProgressYou're More Than a Weapon (first Shell, weapon and sidearm), Home at Last (reach Marrowkeep), Mid Summer? (enter the Festival), This is Not an Achievement (complete the game)
ShellsForever Alone? (Tiel), Arrival (Proxima), Vengeance is Mine (Eredrim), My Brether (Smert), Heartless (Gragu), The Alchemist (Sariel), Down with the Thickness (Lazlo), Shell Seeker (all), Decked Out, Haunting Times, Seeking the Past
WeaponsDeep Cuts, Cut You Down to Size, Big Boi, Dual Wielding, Point Taken, Like Clockwork, Stop - Hammer Time, Lord of War (all weapons), Over 9000 (max a weapon at the Tarforge)
SidearmsOld School (Forgotten Crossbow), Chop Chop (Salvaged Trebuchaxe), Old Painless (Triarch Repeater), Spiked (Caged Hystrix), Beautiful Baby (Cursed Child), Speared (Ballistazooka), Guns. Lots of Guns (all sidearms)
CollectionSat Nav (all map fragments), Bring My Ova Back to Me (all Ova), Stoned (all Tarstones), So Fresh, So Clean (cleanse all beacons), Heavy Metal (play all lute tracks), No Lifer (all achievements)

The 16 hidden achievements include names such as Sester, Nightmare Fuel, Ascension and Peter's Perfect Parry. Their conditions are not shown on the official list, and this page does not guess them.

6 Planning for No Lifer

Explore as you go
Follow raven icons for map fragments and cleanse every beacon; both feed collection achievements and your build.
Buy Merrick's maps
They show where weapons, sidearms and Shells are, the three largest unlock groups.
Keep the Seal off
One careless equip of the Slayer Seal blocks every unlock while it is on.

Over 9000 needs a fully upgraded weapon, so commit materials to one favorite rather than spreading them. Stoned asks for every Tarstone out of more than seventy, which is the longest collection task; Kotaku notes that boss Tarstones point to nearby weapons, so collecting both together saves backtracking.

Summary

Mortal Shell II has eight Shells: Tiel, Proxima, Eredrim, Smert, Genessa, Gragu, Sariel and Lazlo. Bonding at the Shellkeeper costs scarce Glimpses, so focus on two or three, starting with Tiel or Proxima. Night Mode raises difficulty and Gloom rewards, while the Slayer Seal makes fights easier but disables achievements. Of the 53 achievements, 16 are hidden; the rest are mostly unlocks and collections, with every Tarstone and a fully upgraded weapon among the longest.

Comment

No comments yet. Be the first to post one.


Note Do not post abuse, off-site solicitation or illegal information.
None
Attached image preview