Marrow Achievement, Description, Unlock & Secret Number

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Description	Unlocked a new item.
Unlock	Defeat Mom's Heart or It Lives! on hard modeas The Forgotten
In-Game Secret Number	392
Platforms	All
DLC Required	Added in Afterbirth+
Achievement Description

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Description: Alt stage to the basement.
Unlock: Defeat Mom's Heart 11 times
In-Game Secret Number: 342

Burning Basement

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

Void

Description: Unlocked a new item.
Unlock: Complete a Victory Lap, defeating The Lamb
In-Game Secret Number: 321

Once More with Feeling!

Description: Unlocked a new item.
Unlock: Have both the Broken Watch and the Stop Watch in your collection
In-Game Secret Number: 363
PS4 354

Era Walk

Description: Unlocked a new item.
Unlock: Obtain 50 items on a run (e.g., via two Steam Sales and Restock - Duplicate passives/familiars count towards the total, e.g., multiple Breakfasts)
In-Game Secret Number: 330

U Broke It!

Description: Unlocked a new item.
Unlock: Defeat Delirium as The Forgotten
In-Game Secret Number: 401

Book of the Dead

Description: New mode unlocked!
Unlock: Donate 500 coins to the Greed Machine
In-Game Secret Number: 341

Greedier!

Description: Unlocked a new co-player baby.
Unlock: Earn all Hard Mode Completion Marks as Apollyon
In-Game Secret Number: 319

Apollyon Baby

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

Pokey Mans

Description: Unlocked even more bosses!
Unlock: Defeat ??? as 6 different characters
In-Game Secret Number: 347

Something wicked this way comes+!

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

Hairpin

Description: Unlocked a new starting item.
Unlock: Complete challenge #31
In-Game Secret Number: 331

LazBleeds More!

Description: Unlocked a new item.
Unlock: Become Beelzebub
In-Game Secret Number: 352
PS4 343

Angry Fly

Description: Unlocked a new item.
Unlock: Collect every entry in the Bestiary (Bugged v190 - Mobs that don't exist in the bestiary are being counted. This allows Sin Collector to be unlocked without a complete bestiary)
In-Game Secret Number: 324

Sin collector

Description: Unlocked a new item.
Unlock: Defeat Delirium as Lilith
In-Game Secret Number: 292

Euthanasia

Description: Unlocked a new challenge.
Unlock: Defeat ??? or The Lamb for the first time
In-Game Secret Number: 280

Ultra Hard

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: Sleep in a bed
In-Game Secret Number: 359
PS4 350

Wooden Cross

Description: Unlocked a new starting item.
Unlock: Complete challenge #32
In-Game Secret Number: 332

MaggyNow Holds a Pill!

Description: Unlocked a new item.
Unlock: Reset 7 times in a row
In-Game Secret Number: 328

Mr. Resetter!

Description: Unlocked a new item.
Unlock: Open 20 locked chests
In-Game Secret Number: 371
PS4 362

Mr. ME!

Description: Unlocked a new item.
Unlock: Defeat Little Horn 20 times
In-Game Secret Number: 356
PS4 347

Fast Bombs

Description: Unlocked a new item.
Unlock: Defeat Ultra Greedier as Azazel
In-Game Secret Number: 304

Bat Wing

Description: Unlocked a new item.
Unlock: Pick up any 3 of the following items/trinkets in a single run: 9 Volt, The Battery, Car Battery, AAA Battery, Watch Battery
In-Game Secret Number: 367
PS4 358

Jumper Cables