Slitterhead has 41 achievements and 42 trophies (if you count the Platinum). By just following the main storyline and completing the missions laid out in front of players, they should be able to complete the game with about 70% of the achievements unlocked. However, to get the rest of them, you'll need to find some collectibles, beat the game on its hardest mode, and do other not-so-easy tasks.

This trophy/achievement guide for Slitterhead will list all 41 accomplishments and include details on how to obtain them.

It's worth noting that the trophy/achievement descriptions will contain spoiler material for Slitterhead. Proceed with caution.

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Slitterhead Achievement / Trophy Guide

anita slitterhead

Trophy/Achievement Name and Description

Unlock Method

Slitterhead Legend Complete

Unlock every other Trophy in Slitterhead (PlayStation only).

Acquired all Trophies

Edge of Madness

Progress the main story

Completed Prostitute Chapter

Last Echoes of Love

Progress the main story

Completed Cult Chapter

Loss of Casuality

Progress the main story

Completed Nurse Chapter

Requiem for Michelle

Complete the Mantis Trap mission.

Vanquished Michelle, the Devil's Flower Mantis Slitterhead

Crucifix of Blood

Part of the story

Defeated Lisa, the Mimic Octopus Slitterhead

Empty Peace

Complete Undying Scorn RE (2nd Loop) mission

Sealed Lisa, the Mimic Octopus Slitterhead, away in the interstice of space-time.

The Cruelty of Yin Yue

Complete the Drifting Devil mission

Vanquished Yin Yue, the Reef Stonefish Slitterhead.

Just One Consequence

Part of the story

Killed Julee in the Omega world

Timeline Collapse

Complete the Last Duel mission

Defeated Alex in the Alpha World

Timeline Convergence

Complete Last Duel RE (2nd Loop) mission

Stopped Alex's (Leopard Head's) killing spree in the Alpha world

Survival

Complete the intro

Managed to escape the monster in the back alley

A Rare Encounter

After clearing the intro and beating the 'Alley Monster,' Julee will be unlocked.

Julee Joined You

The Black Rider

Alex joins you towards the end of the mission, Black Payback

Alex Joined You

Neon Black Swan

Anita joins you at the end of the mission, Missing Girl RE (2nd Loop)

Anita joined you

Drunken Angel

Take control of the dog on the main street in the Lurking Parasite RE (2nd Loop) mission.

Edo joined you

Glass Teen

Take Edo with you on the Sleepless Zone RE (2nd Loop) level. Once you make it to the checkpoint outside on the roof of the building you go through in the intro, there will be a locked door that only Edo can open. You can find Doni further inside.

Doni joined you

The Housekeeper Sees

In the Hidden Cave RE (2nd Loop) mission, you can find Tri by going into an open window in a hallway while you're on the way to find the overlook over the dining hall.

Tri joined you

The Turncoat Pierrot

Complete the Jar of Poison mission with Tri.

Blake joined you

Friend of the Fairy

You need to find and speak to the Mysterious Old Lady six times throughout six stages: Oppressive Force RE 2nd Loop, Lurking Parasite RE 2nd Loop, Missing Girl RE 2nd Loop, Insidious Sucker RE 2nd Loop, Sleepless Zone RE 2nd Loop, Hidden Cave RE 2nd Loop.

Betty joined you

Masquerade

For Rarity Masks and Costumes, you will need to complete the story and go back and collect everything.

Collected all Rarity masks

Fashionista

For Rarity Masks and Costumes, you will need to complete the story and go back and collect everything.

Collected all Rarity costumes

Total Recall

The memory fragments will be scattered around some of the missions. You can see which missions have them on the mission select screen. Collecting them will give you more Skill Points.

Gathered all of Hyoki's memory fragments

Shrine Robber

Look out for the Shrine Trial icon on the mission select screen. These reward players with special costume items for the Rarities.

Completed all Shrine Trials

Full Spec

Upgrade the Rarities using Skill Points

Got all Rarities to the max level

You Dropped Something

We got this while fighting the Alley Monster in the opening.

Cut off a Slitterhead's human parts for the first time

Technique Enthusiast

Guard and then use the right stick to parry attacks from the Slitterheads.

Successfully deflected 10 times

Technique Expert

Guard and then use the right stick to parry attacks from the Slitterheads.

Successfully deflected 100 times

Technique Master

Guard and then use the right stick to parry attacks from the Slitterheads.

Successfully deflected 200 times

Focused

If you keep deflecting attacks, Blood Time will activate, allowing you to get more hits in.

Activated Blood Time ten times

Composed

If you keep deflecting attacks, Blood Time will activate, allowing you to get more hits in.

Activated Blood Time 30 times

Clear and Serene

If you keep deflecting attacks, Blood Time will activate, allowing you to get more hits in.

Activated Blood Time 50 times

New Hyoki Legend

Beat the game on Normal

Cleared on Normal or higher difficulty

True Hyoki Legend

Beat the game on Hard

Cleared on Hard or higher difficulty

Apex Hyoki Legend

Beat the game on Nightmare

Cleared on Nightmare or Higher Difficulty

Power of Blood

Each Rarity has their own set of Active Skills. Use them during battle to unlock this one. You can upgrade them at the home menu on the Status screen.

Used Active Skills 10 times

Jack of All Blood

Each Rarity has their own set of Active Skills. Use them during battle to unlock this one. You can upgrade them at the home menu on the Status screen.

Used Active Skills 100 times

Command of All Techniques

Each Rarity has their own set of Active Skills. Use them during battle to unlock this one. You can upgrade them at the home menu on the Status screen.

Used all Active Skills

Force Majeure

It should happen naturally as you play the story.

Caused 100 civilian casualties

Lion Among Wolves

It should happen naturally as you play the story.

Defeated 20 Slitterheads

Natural Enemy

It should happen naturally as you play the story.

Defeated 50 Slitterheads

Crimson Abyss

It should unlock early on as you keep using Blood powers.

Expended 100 liters of blood.