Filigree Feather Achievement, Description, Unlock & Secret Number

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Description	Unlocked a new item.
Unlock	Acquire both key pieces
In-Game Secret Number	370 PS4 361
Platforms	All
DLC Required	Added in Afterbirth+
Achievement Description

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Description: Unlocked a new item.
Unlock: Defeat Delirium as Apollyon
In-Game Secret Number: 295

Void

Description: Unlocked a new item.
Unlock: Die to your own explosion from Ipecac, Bob's Rotten Head, or Horf! pill
In-Game Secret Number: 384

Lil Spewer

Description: Unlocked a new item.
Unlock: Defeat Mom's Heart or It Lives! on hard modeas Apollyon
In-Game Secret Number: 318

Smelter

Description: Just Stop!
Unlock: Collect every item in the game, unlock all secrets and endings, and complete the Bestiary
In-Game Secret Number: 339

1000000%

Description: Unlocked a new item.
Unlock: Defeat Ultra Greedier as Lilith
In-Game Secret Number: 306

Duality

Description: Unlocked a new item.
Unlock: Defeat Satan as The Forgotten
In-Game Secret Number: 394

Pointy Rib

Description: Unlocked a new item.
Unlock: Use cards and runes 20 times
In-Game Secret Number: 362
PS4 353

Ancient Recall

Description: Unlocked a new item.
Unlock: Defeat Ultra Greedier as Magdalene
In-Game Secret Number: 297

Glyph of Balance

Description: Unlocked a new item.
Unlock: Defeat Delirium as Magdalene
In-Game Secret Number: 283

Eucharist

Description: Unlocked a new item.
Unlock: Defeat Ultra Greedier as Cain
In-Game Secret Number: 298

Sack of Sacks

Description: Unlocked a new item.
Unlock: Recharge using batteries 20 times
In-Game Secret Number: 358
PS4 349

Hairpin

Description: Unlocked a new challenge.
Unlock: Defeat Mom's Heart 11 times
In-Game Secret Number: 279

Pokey Mans

Description: Alt stage to the caves.
Unlock: Defeat It Lives 16 times
In-Game Secret Number: 343

Flooded Caves

Description: Unlocked a new item.
Unlock: Defeat Ultra Greedier as Samson
In-Game Secret Number: 301

Stem Cell

Description: Unlocked a new item.
Unlock: It's complicated
In-Game Secret Number: 391

Bone Heart

Description: Unlocked a new item.
Unlock: Complete 2 Victory Laps and start a 3rd
In-Game Secret Number: 360
PS4 351

Butter!

Description: Unlocked a new item.
Unlock: Defeat Delirium as Lazarus
In-Game Secret Number: 291

Compound Fracture

Description: Unlocked a new item.
Unlock: Destroy 500 rocks
In-Game Secret Number: 350
PS4 341

Mystery Gift

Description: Unlocked a new item.
Unlock: Defeat Delirium as Eve
In-Game Secret Number: 288

Dull Razor

Description: Unlocked a new item.
Unlock: Defeat ??? as Apollyon
In-Game Secret Number: 312

Locust of Famine

Description: Unlocked a new item.
Unlock: Complete a floor after Basement I, start-to-finish, with only half a heart of health (can use The Lost)
In-Game Secret Number: 329

Living on the Edge

Description: Unlocked a new item.
Unlock: Spawn three charmed enemies in the same room
In-Game Secret Number: 387

Mystery Egg

Description: Unlocked a new item.
Unlock: Participate in 31 Daily Challenges (they don't have to be consecutive; it will still count if you die in the first room)
In-Game Secret Number: 325

Dedication