A Small Rock

Unlocked a new item.

Little C.H.A.D.

Unlocked a new item.

The Necronomicon

Unlocked a new item.

Mom's Knife

Unlocked a new item.

The D20

Unlocked a new item.

Bloody Lust

Unlocked a new item.

Blood Penny

Unlocked a new item.

Isaac's Head

Unlocked a new item.

Isaac's Tears

Unlocked a new item.

Eve's Mascara

Unlocked a new item.

Samson's Chains

Unlocked a new item.

Blank Card

Unlocked a new item.

Mysterious Paper

Unlocked a new item.

Satanic Bible

Unlocked a new item.

Abaddon

Unlocked a new item.

Blood Bag

Unlocked a new item.

Missing Poster

Unlocked a new item.

Begotten Baby

Unlocked a new co-player baby.

Glitch Baby

Unlocked a new co-player baby.

Fighting Baby

Unlocked a new co-player baby.

Box of Friends

Unlocked a new item.

I RULE!

Unlocked Challenge #26.

Cry Baby

Unlocked a new co-player baby.

Rage Baby

Unlocked a new co-player baby.

Buddy Baby

Unlocked a new co-player baby.

Keeper now holds... A Penny!

Unlocked a new item.

1001%

Nerd x 1000000

Keeper holds Wooden Nickel

Unlocked a new starting item.

Keeper holds Store Key

Unlocked a new starting item.

Deep Pockets

Unlocked a new item.

Sticky Nickels

Unlocked a new item.

Backasswards

Unlocked a new challenge.

Ultra Hard

Unlocked a new challenge.

D Infinity

Unlocked a new item.

Eucharist

Unlocked a new item.

Dark Prince's Crown

Unlocked a new item.

Crooked Penny

Unlocked a new item.

D1

Unlocked a new item.

Duality

Unlocked a new item.

Delirious

Unlocked a new item.

Apollyon

Unlocked a new character.

Scarred Womb

Alt stage to the womb.

Something wicked this way comes!

Unlocked new bosses!

Something wicked this way comes+!

Unlocked even more bosses!

Black Hole

Unlocked a new item.

Fast Bombs

Unlocked a new item.

Lil Delirium

Unlocked a new item.

Wooden Cross

Unlocked a new item.

Jumper Cables

Unlocked a new item.

Angelic Prism

Unlocked a new item.

Door Stop

Unlocked a new item.

Trisagion

Unlocked a new item.

Extension Cord

Unlocked a new item.

Rotten Penny

Unlocked a new item.

Baby-Bender

Unlocked a new item.

The Forgotten

Unlocked a new character.

Bone Heart

Unlocked a new item.

Marrow

Unlocked a new item.

Pointy Rib

Unlocked a new item.

Brittle Bones

Unlocked a new item.

Divorce Papers

Unlocked a new item.

Hallowed Ground

Unlocked a new item.

Finger Bone

Unlocked a new item.

Dad's Ring

Unlocked a new item.

Book of the Dead

Unlocked a new item.

Bone Baby

Unlocked a new co-player baby.

Bound Baby

Unlocked a new co-player baby.

Flat Stone

Unlocked a new item.

Jacob and Esau

You are just like your father...

Ashpit

Defeat all bosses in the Mines.

Gehenna

Defeat all bosses in the Mausoleum.

Meat Cleaver

Complete the Corpse with Isaac.

Options?

Complete the final chapter with Isaac.

Cracked Orb

Complete the final chapter with Eve.

'M

Complete the Corpse with Eden.

Keeper's Sack

Complete the Corpse with Keeper.

Bone Spurs

Complete the Corpse with the Forgotten.

Spirit Shackles

Complete the final chapter with the Forgotten.

The Broken

???

The Dauntless

???

The Hoarder

???

The Deceiver

???

The Soiled

???

The Curdled

???

The Savage

???

The Benighted

???

The Enigma

???

The Capricious

???

The Harlot

???

The Miser

???

The Empty

???

The Fettered

???

The Zealot

???

The Deserter

???

Strawman

???

Bloody Mary

Unlocked a new challenge.

Isaac's Awakening

Unlocked a new challenge.

Seeing Double

Unlocked a new challenge.

Hot Potato

Unlocked a new challenge.

Cantripped!

Unlocked a new challenge.

Red Redemption

Unlocked a new challenge.

DELETE THIS

TODO: remove this achievement

The Hanged Man

???

Brimstone Bombs

Kill Hornfel before he escapes!

Keeper's Bargain

???

Cursed Penny

???

Hollow Heart

???

Decap Attack

???

Golden Penny

???

Golden Battery

???

Soul of Isaac

???

Soul of the Keeper

???

A Strange Door

Where could it lead to?

Magdalene

Unlocked a new character.

Cain

Unlocked a new character.

Judas

Unlocked a new character.

The Womb

Chapter 4 - The Womb unlocked.

The Harbingers

The horsemen are loose.

Something From The Future

New boss in the basement!

Something Cute

New boss in the caves!

Something Sticky

New boss in the depths!

The D6

Isaac now holds the D6!

Everything is Terrible!!!

The game just got harder!

It Lives!

Your future's past waits.

Basement Boy

Beat basement without taking damage.

Spelunker Boy

Beat caves without taking damage.

Dark Boy

Beat depths without taking damage.

Mama's Boy

Beat womb without taking damage.

Eve

Unlocked a new character.

A Forgotten Horseman

Unlocked a new boss!

Samson

Unlocked a new character.

Something Icky

New boss in the womb!

Azazel

Unlocked a new character.

Lazarus

Unlocked a new character.

Eden

Unlocked a new character.

Super Meat Boy

Built him out of meat cubes.

Lord of the Flies

You became Lord of the Flies.

Fart Baby

Unlocked a new item.

Purity

Unlocked a new item.

D12

Unlocked a new item.

Betrayal

Unlocked a new item.

Fate's Reward

Unlocked a new item

Athame

Unlocked a new item.

Blind Rage

Unlocked a new item.

Maw of the Void

Unlocked a new item.

Empty Vessel

Unlocked a new item.

Eden's Blessing

Unlocked a new item.

Sworn Protector

Unlocked a new item.

Incubus

Unlocked a new item.

Lil' Chest

Unlocked a new item.

Censer

Unlocked a new item.

Evil Eye

Unlocked a new item.

My Shadow

Unlocked a new item.

Cracked Dice

Unlocked a new item.

Black Feather

Unlocked a new item.

Lusty Blood

Unlocked a new item.

Lilith

Unlocked a new character.

Key Bum

Unlocked a new item.

GB Bug

Unlocked a new item.

Zodiac

Unlocked a new item.

Rune Bag

Unlocked a new item.

Cambion Conception

Unlocked a new item.

Serpent's Kiss

Unlocked a new item.

Succubus

Unlocked a new item.

Immaculate Conception

Unlocked a new item.

Gold Heart

Unlocked a new item.

Get out of Jail Free Card

Unlocked a new item.

Gold Bomb

Unlocked a new item.

2 new pills

Unlocked a new item.

2 new pills

Unlocked a new item.

Poker Chip

Unlocked a new item.

Stud Finder

Unlocked a new item.

D8

Unlocked a new item.

Kidney Stone

Unlocked a new item.

Blank Rune

Unlocked a new item.

Blue Womb

Unlocked a hidden chapter.

Lucky Pennies

Unlocked a new item.

Wooden Nickel

Unlocked a new item.

Cain holds Paperclip

Unlocked a new starting item.

XXXXXXXXL

Unlocked Challenge #21.

SPEED!

Unlocked Challenge #22.

Blue Bomber

Unlocked Challenge #23.

PAY TO PLAY

Unlocked Challenge #24.

Have a heart

Unlocked Challenge #25.

BRAINS!

Unlocked Challenge #27.

PRIDE DAY!

Unlocked Challenge #28.

Onan's Streak

Unlocked Challenge #29.

The Guardian

Unlocked Challenge #30.

Red Baby

Unlocked a new co-player baby.

Green Baby

Unlocked a new co-player baby.

Brown Baby

Unlocked a new co-player baby.

Blue Baby

Unlocked a new co-player baby.

Lil' Baby

Unlocked a new co-player baby.

Black Baby

Unlocked a new co-player baby.

Long Baby

Unlocked a new co-player baby.

Yellow Baby

Unlocked a new co-player baby.

White Baby

Unlocked a new co-player baby.

Big Baby

Unlocked a new co-player baby.

Goat Head Baby

Unlocked a new co-player baby.

Hive Baby

Unlocked a new co-player baby.

Colorful Baby

Unlocked a new co-player baby.

Whore Baby

Unlocked a new co-player baby.

Cracked Baby

Unlocked a new co-player baby.

Dripping Baby

Unlocked a new co-player baby.

Blinding Baby

Unlocked a new co-player baby.

Sucky Baby

Unlocked a new co-player baby.

Dark Baby

Unlocked a new co-player baby.

Picky Baby

Unlocked a new co-player baby.

Revenge Baby

Unlocked a new co-player baby.

Belial Baby

Unlocked a new co-player baby.

Special Hanging Shopkeepers

Unlocked a secret.

Everything is Terrible 2!!!

Greed just got harder!

Special Shopkeepers

Unlocked a secret.

Eve now holds Razor Blade

Unlocked a new starting item.

Store Key

Unlocked a new item.

Lost holds Holy Mantle

Unlocked a new starting item.

Mega

Unlocked...

Rib of Greed

Unlocked a new item.

Noose Baby

Unlocked a new item.

Karma

Unlocked a new item.

Super Greed Baby

Unlocked a new item.

Keeper

Unlocked a new character.

Sale Baby

Unlocked a new item.

Aprils fool

Unlocked a new challenge.

Pokey Mans

Unlocked a new challenge.

PONG

Unlocked a new challenge.

Silver Dollar

Unlocked a new item.

Shade

Unlocked a new item.

King Baby

Unlocked a new co-player baby.

Bloody Crown

Unlocked a new item.

Dull Razor

Unlocked a new item.

Eden's Soul

Unlocked a new item.

Compound Fracture

Unlocked a new item.

Euthanasia

Unlocked a new item.

Holy Card

Unlocked a new item.

Void

Unlocked a new item.

Glyph of Balance

Unlocked a new item.

Sack of Sacks

Unlocked a new item.

Eye of Belial

Unlocked a new item.

Meconium

Unlocked a new item.

Stem Cell

Unlocked a new item.

Crow Heart

Unlocked a new item.

Metronome

Unlocked a new item.

Bat Wing

Unlocked a new item.

Plan C

Unlocked a new item.

Dad's Lost Coin

Unlocked a new item.

Eye of Greed

Unlocked a new item.

Black Rune

Unlocked a new item.

Locust of Wrath

Unlocked a new item.

Locust of Pestilence

Unlocked a new item.

Locust of Famine

Unlocked a new item.

Locust of Death

Unlocked a new item.

Locust of Conquest

Unlocked a new item.

Hushy

Unlocked a new item.

Brown Nugget

Unlocked a new item.

Mort Baby

Unlocked a new co-player baby.

Smelter

Unlocked a new item.

Apollyon Baby

Unlocked a new co-player baby.

New Area

Unlocked a new area.

Once More with Feeling!

Unlocked a new item.

Hat trick!

Unlocked a new item.

5 Nights at Mom's

Unlocked super special rocks.

Sin collector

Unlocked a new item.

Dedication

Unlocked a new item.

ZIP!

Unlocked a new item.

It's the Key

Unlocked a new item.

Mr. Resetter!

Unlocked a new item.

Living on the edge

Unlocked a new item.

U Broke It!

Unlocked a new item.

Laz Bleeds More!

Unlocked a new starting item.

Maggy Now Holds a Pill!

Unlocked a new starting item.

Charged Key

Unlocked a new item.

Samson Feels Healthy!

Unlocked a new starting item.

Greed's Gullet

Unlocked a new item.

The Marathon

Unlocked a new item.

RERUN

Unlocked the power of RERUN.

Greedier!

New mode unlocked!

Burning Basement

Alt stage to the basement.

Flooded Caves

Alt stage to the caves.

Dank Depths

Alt stage to the depths.

The gate is open!

Unlocked new enemies!

Mystery Gift

Unlocked a new item.

Sprinkler

Unlocked a new item.

Angry Fly

Unlocked a new item.

Bozo

Unlocked a new item.

Broken Modem

Unlocked a new item.

Buddy in a Box

Unlocked a new item.

Hairpin

Unlocked a new item.

Butter

Unlocked a new item.

Huge Growth

Unlocked a new item.

Ancient Recall

Unlocked a new item.

Era Walk

Unlocked a new item.

Coupon

Unlocked a new item.

Telekinesis

Unlocked a new item.

Moving Box

Unlocked a new item.

Leprosy

Unlocked a new item.

Technology Zero

Unlocked a new item.

Filigree Feather

Unlocked a new item.

Mr. Me

Unlocked a new item.

7 Seals

Unlocked a new item.

Pop!

Unlocked a new item.

Death's List

Unlocked a new item.

Haemolacria

Unlocked a new item.

Lachryphagy

Unlocked a new item.

Schoolbag

Unlocked a new item.

Sacrificial Altar

Unlocked a new item.

Lil Spewer

Unlocked a new item.

Blanket

Unlocked a new item.

Marbles

Unlocked a new item.

Mystery Egg

Unlocked a new item.

Bethany

Beat Hard mode as Lazarus without losing a life

The Planetarium

Kids shouldn't believe in fortunes...

A Secret Exit

Complete ??? 3 times.

Forgotten Lullaby

Get that song out of her head.

Fruity Plum

Defeat Baby Plum 10 times.

Plum Flute

Make a new friend!

Rotten Heart

Enter the Corpse...

Dross

Defeat all bosses in Downpour.

Red Key

The other side is calling...

Wisp Baby

Beat the game in Hard mode with Bethany.

Book of Virtues

Complete the Cathedral with Bethany.

Urn of Souls

Complete Sheol with Bethany.

Blessed Penny

Complete the Chest with Bethany.

Alabaster Box

Complete the Dark Room with Bethany.

Beth's Faith

Complete Boss Rush with Bethany.

Soul Locket

Beat Greed mode with Bethany.

Divine Intervention

Complete ??? with Bethany.

Vade Retro

Beat Greedier mode with Bethany.

Star of Bethlehem

Beat the Void with Bethany.

Hope Baby

Beat everything in Hard mode with Bethany.

Glowing Baby

Defeat Mega Satan with Bethany.

Double Baby

Beat the game in Hard mode with Jacob and Esau.

The Stairway

Complete the Cathedral with Jacob and Esau.

Red Stew

Complete Sheol with Jacob and Esau.

Birthright

Complete the Chest with Jacob and Esau.

Damocles

Complete the Dark Room with Jacob and Esau.

Rock Bottom

Complete Boss Rush with Jacob and Esau.

Inner Child

Beat Greed mode with Jacob and Esau.

Vanishing Twin

Complete ??? with Jacob and Esau.

Genesis

Beat Greedier mode with Jacob and Esau.

Suplex!

Complete the Void with Jacob and Esau.

Solomon's Baby

Beat everything in Hard mode with Jacob and Esau.

Illusion Baby

Defeat Mega Satan with Jacob and Esau.

Yuck Heart

Complete the Corpse with Magdalene.

Candy Heart

Complete the final chapter with Magdalene.

Guppy's Eye

Complete the Corpse with Cain.

A Pound of Flesh

Complete the final chapter with Cain.

Akeldama

Complete the Corpse with Judas.

Redemption

Complete the final chapter with Judas.

Eternal D6

Complete the Corpse with ???.

Montezuma's Revenge

Complete the final chapter with ???.

Bird Cage

Complete the Corpse with Eve.

Bloody Gust

Complete the Corpse with Samson.

Empty Heart

Complete the final chapter with Samson.

Devil's Crown

Complete the Corpse with Azazel.

Lil Abaddon

Complete the final chapter with Azazel.

Tinytoma

Complete the Corpse with Lazarus.

Astral Projection

Complete the final chapter with Lazarus.

Everything Jar

Complete the final chapter with Eden.

Lost Soul

Complete the Corpse with the Lost.

Hungry Soul

Complete the final chapter with the Lost.

Blood Puppy

Complete the Corpse with Lilith.

C Section

Complete the final chapter with Lilith.

Keeper's Box

Complete the final chapter with Keeper.

Lil Portal

Complete the Corpse with Apollyon.

Worm Friend

Complete the final chapter with Apollyon.

Revelation

Complete the Corpse with Bethany.

Jar of Wisps

Complete the final chapter with Bethany.

Magic Skin

Complete the Corpse with Jacob and Esau.

Friend Finder

Complete the final chapter with Jacob and Esau.

Baptism by Fire

Unlocked a new challenge.

Pica Run

Unlocked a new challenge.

Charged Penny

They will charge you up... for a small fee.

Old Capacitor

Kill 10 Battery Bums.

Mega Mush

Beat everything in Hard Mode as every character.

Member Card

Spend 40+ pennies in a single shop.

Golden Razor

Obtain 99 pennies. Then spend every single one of them.

Dead God

Play Online

Play an online match

Win Online

Win an online match

Win Online Daily

Win an online Daily Run

259 hidden achievements remaining

Details for each achievement will be revealed once unlocked