Fighting Baby Achievement, Description, Unlock & Secret Number

Description	Unlocked a new co-player baby.
Unlock	Defeat Mom's Heart on hard mode as Samson
In-Game Secret Number	177
Platforms	All
DLC Required	None
Achievement Description

Description: New boss in the depths!
Unlock: Beat Chapter 3 20 times
In-Game Secret Number: 18

Something Sticky

Description: Unlocked a new item.
Unlock: Complete challenge #17
In-Game Secret Number: 103

Death's Touch

Description: Unlocked a new co-player baby.
Unlock: Removed in Afterbirth+: Defeat Mom's Heart on hard mode as Azazel
Added in Afterbirth+: Defeat Mom's Heart on hard mode as Lazarus
In-Game Secret Number: 172

Wrapped Baby

Description: Unlocked a new item.
Unlock: Defeat Satan as ???
In-Game Secret Number: 48

Forget Me Now

Description: Unlocked a new item.
Unlock: Complete challenge #5
In-Game Secret Number: 93

Rune of Ansuz

Description: New boss in the basement!
Unlock: Beat The Basement 40 times
In-Game Secret Number: 16

Something From The Future

Description: Unlocked a new item.
Unlock: Defeat Steven for the 1st time
In-Game Secret Number: 24

Little Steven

Description: Unlocked a new item.
Unlock: Defeat The Lamb as Samson
In-Game Secret Number: 74

Samson's Lock

Description: Unlocked Challenge #7.
Unlock: Defeat Mom's Heart 11 times
In-Game Secret Number: 160

Suicide King

Description: Unlocked a new item.
Unlock: Use the Blood Donation Machine 30 times
In-Game Secret Number: 147

Blood Bag

Description: Unlocked a new item.
Unlock: Defeat Isaac as Lazarus
In-Game Secret Number: 116

Lazarus' Rags

Description: Unlocked a new item.
Unlock: Complete challenge #12
In-Game Secret Number: 100

Card Against Humanity

Description: Unlocked Challenge #9.
Unlock: Defeat Mom's Heart 9 times
In-Game Secret Number: 162

Demo Man

Description: Unlocked a new item.
Unlock: Defeat Mom's Heart 2 times
In-Game Secret Number: 150

Rubber Cement

Description: Alt stage to the depths.
Unlock: Beat all The Depths bosses (not restricted to beating bosses in the Depths)
In-Game Secret Number: 88

The Necropolis

Description: Unlocked a new item.
Unlock: Complete the Boss Rush as Lazarus
In-Game Secret Number: 105

Missing No.

Description: Unlocked a new co-player baby.
Unlock: Defeat Mom's Heart on hard mode as Eden
In-Game Secret Number: 176

Glitch Baby

Description: Your future's past waits.
Unlock: Defeat Mom's Heart 11 times
In-Game Secret Number: 34

It Lives!

Description: Unlocked a new item.
Unlock: Defeat Satan as The Lost
In-Game Secret Number: 130

The Mind

Description: Unlocked a new item.
Unlock: Visit 10 arcades
In-Game Secret Number: 26

A Gamekid

Description: Unlocked a new item.
Unlock: Become Guppy
In-Game Secret Number: 65

Guppy's Hairball

Description: Unlocked a new character.
Unlock: Have 4 or more soul hearts at one time
In-Game Secret Number: 80

Lazarus

Description: Unlocked a new item.
Unlock: Complete challenge #19
In-Game Secret Number: 62

Epic Fetus

Description: Unlocked a new character.
Unlock: Defeat Satan for the 1st time
In-Game Secret Number: 3

Judas

Description: Unlocked a new item.
Unlock: Pick up any 2 of the following items in a single run: Bob's Rotten Head, Dead Cat, Cricket's Head, Tammy's Head
In-Game Secret Number: 31

The Parasite