Zertonium

A Cut Above Defeat 5 enemies with the Knife.

Get Physical Defeat 20 enemies with physical attacks.

Baptism by Fire Defeat 3 Majini at once with a drum or gas tank explosion.

A Friend in Need Save partner 10 times when HELP is displayed.

Completed Chapter 2 - 2 Complete Chapter 2 - 2 on any difficulty setting.

Completed Chapter 2 - 3 Complete Chapter 2 - 3 on any difficulty setting.

Completed Chapter 3 - 1 Complete Chapter 3 - 1 on any difficulty setting.

Meat Shower Defeat 3 Majini with one grenade or proximity bomb.

Completed Chapter 3 - 2 Complete Chapter 3 - 2 on any difficulty setting.

Completed Chapter 3 - 3 Complete Chapter 3 - 3 on any difficulty setting.

Completed Chapter 4 - 1 Complete Chapter 4 - 1 on any difficulty setting.

Completed Chapter 4 - 2 Complete Chapter 4 - 2 on any difficulty setting.

Completed Chapter 5 - 1 Complete Chapter 5 - 1 on any difficulty setting.

Completed Chapter 5 - 2 Complete Chapter 5 - 2 on any difficulty setting.

Completed Chapter 5 - 3 Complete Chapter 5 - 3 on any difficulty setting.

Completed Chapter 6 - 1 Complete Chapter 6 - 1 on any difficulty setting.

Completed Chapter 6 - 2 Complete Chapter 6 - 2 on any difficulty setting.

Lifeguard Save partner 10 times when DYING is displayed.

Completed Chapter 6 - 3 Complete Chapter 6 - 3 on any difficulty setting.

Recruit Complete all chapters on Amateur.

Just a Scratch Complete 'Enter, Pursued by a Memory'.

Drive By Stop an armored truck by taking out the driver.

Masters of Removing Work together to save someone special.

Cattle Prod Defeat 30 enemies with the Stun rod.

Soldier Complete all chapters on Normal.

Heart Stopper Defeat a certain enemy by stabbing it in the heart.

Father Gascoigne Defeat the beast that once was Father Gascoigne.

Ride the Lightning Defeat a Majini using the electric current from a transformer.

Go into the Light Defeat 2 enemies with one flash grenade.

Who Do You Trust? Build up a certain level of trust with your partner.

Back in the Mud Complete Chapter 1.

Egg on Your Face Defeat a Majini with a rotten egg.

Rune Contact Acquire a Caryll Rune that endows hunters with special strength.

Blood-starved Beast Defeat Blood-starved Beast.

Chalice of Pthumeru Acquire the Chalice of Pthumeru that seals the catacombs
that form a web deep below Yharnam.

Egg Hunt Find all 4 types of eggs.

Vicar Amelia Defeat the beast that once was Vicar Amelia.

Bad Blood During the first fight with Wesker, damage him a set number of times.

Lead Aspirin Defeat a Majini with a headshot while it's jumping.

The Witch of Hemwick Defeat the Witch of Hemwick.

Crowd Control Defeat 30 enemies with the Gatling gun.

Shadow of Yharnam Defeat the Shadow of Yharnam.

Badge of Honor Find all the BSAA emblems.

Bull's-eye Defeat 30 enemies with the Longbow.

The Works Chain the maximum number of combos together in one go.

…A Scavenger… Reach level 20

Rom, the Vacuous Spider Defeat Great One: Rom, the Vacuous Spider.

All Dressed Up Purchase all available alternative costumes in Bonus Features.

Rune Master Acquire an extremely precious Caryll Rune.

…A Reaver… Reach level 30