Full Gameplay Walkthrough...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Arrival	Unlock Proxima.
Ascension	Discover the secret of the Mango.
Baghead	You've mastered nothing and this is your reward. Pretty pointless, eh?
Beautiful Baby	Unlock the Cursed Child.
Big Boi	Unlock Great Martyr's Blade.
Bring My Ova Back to Me	Collect all of the Ova.
Chop Chop	Unlock the Salvaged Trebuchaxe.
Cut You Down to Size	Unlock the Veteran's Battle Axe.
Decked Out	Reach the maximum bonding tier for a Shell at the Shellkeeper.
Deep Cuts	Unlock Axe and Dagger.
Down with the Thickness	Unlock Lazlo.
Dual Wielding	Unlock the Axatana.
Feed Me	Cause Egon to pass away.
Forever Alone?	Unlock Tiel.
Guns. Lots of Guns	Unlock all Sidearms.
Haunting Times	Watch your first Shell Memory.
Headcase	Defeat The Nameless Captive.
Heartless	Unlock Gragu.
Heavy Metal	Play all Lute Tracks in the Game.
Home at Last	Reach Marrowkeep.
It burnssssssssss	Defeat Droeg, the Conquerer.
It's over now?	Defeat Zmey, the Unbidden.
Like Clockwork	Unlock the Clockwork Scythe.
Lord of War	Unlock all Weapons.
Lost Your Head	Defeat Orrem, the Reclaimed.
Meat's Back on the Menu, Boys!	Defeat The Lost Child.
Mid Summer?	Enter the Festival.
My Brether	Unlock Smert.
Nightmare Fuel	Defeat Sir Isaac, the Scholar-Prince.
No Lifer	Unlock All Achievements for Mortal Shell II.
No, You Still Can't Win	Take the Tar Golem to his Minimum Health.
Old Painless	Unlock the Triarch Repeater.
Old School	Unlock the Forgotten Crossbow.
Over 9000	Max out a Weapon at the Tarforge.
Peter's Perfect Parry	Parry each one of The Nameless Captive's headspins.
Point Taken	Unlock Black Needle.
Praise him!	Defeat The Monolith.
Sat Nav	Find all Map Fragments.
Seeking the Past	Watch all Shell Memories.
Sester	Unlock Sester Genessa.
Shell Seeker	Unlock all Shells.
So Fresh, So Clean	Cleanse All Beacons.
Something in the deep...	Defeat Hexapod.
Speared	Unlock the Ballistazooka.
Spiked	Unlock the Caged Hystrix.
Stoned	Find all Tarstones.
Stop - Hammer Time	Unlock the Obsidian Hammer.
The Alchemist	Unlock Sariel.
This is Not an Achievement	Complete Mortal Shell II.
Ultimate Gainz	Defeat Malborn Offspring.
Vengeance is Mine	Unlock Eredrim.
Wheelie Good Time	Defeat Magdalena, the Lady of the Woods.
You're More Than a Weapon	Claim your first Shell, Weapon and Sidearm.