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Xxx form2Isaac RebirthKeeper sprite

Wrath of the Lamb saw the addition of a new feature, challenges. Challenges are special playthroughs where the player starts with a specific item or set up, and some limitation such as no Treasure Rooms or the Curse of Darkness for every floor. Upon completion of each challenge, the player unlocks a new item that can be found in the game, as well as unlocking a Steam achievement. Completing challenges also counts as beating the game, so a new ending will be unlocked upon completion. 

Note: Skipping the goal with an I AM ERROR Room or the We Need to Go Deeper! item will make the challenge unwinnable until you re-complete it normally.

Vanilla / Wrath

Challenge Title Conditions Goal Reward
Dark was the Night Gives you the Curse of Darkness - you will have no map.

A glitch may occur when completing this challenge, giving you the achievement for completing the "7 Years Bad Luck" challenge but you still get the correct item. There is another glitch where it gives you neither.

Mom The Candle

The Candle

7 Years Bad Luck Starts you with minimum (negative) luck.

Increases your chances of getting a curse on any given floor.

Chance to not spawn a Treasure Room on any given floor.

You start without any activatable item.

When you complete this challenge, there is a bug that can make you get the achievement for completing the Challenge "Large Marge" (Challenge 3) instead of getting the achievement for Challenge 2 although you still get the item from completing Challenge 2.

Mom Lucky Toe

The Lucky Toe

Large Marge Gives you the Curse of the Labyrinth. Treasure Rooms are present.

A glitch may occur when completing this challenge, giving you the achievement for completing the "Dark was the Night" challenge but you still get the correct item.

Beating the first boss in Necropolis XL instead of Mom will complete the challenge.

Mom Burnt Penny

The Burnt Penny

9 Deaths Gives you the Dead Cat item.

Treasure Rooms are present.

Bug: Guppy's Tail is obtainable before beating this challenge.

Mom Guppy's Tail

Guppys Tail

Lord of the Flies Gives you Infestation and The Mulligan. No Treasure Rooms.

Beating Mom's Heart will complete the challenge.

Mom's Heart Fish Head

The Fish Head

The Doctor's Revenge! Gives you the Dr. Fetus item and the Doctor's Remote. No Treasure Rooms.

Beating Mom's Heart will complete the challenge.

Mom's Heart Epic Fetus


Meat 4 Evar! Starts you with a level four Meat Boy. No Treasure Rooms.

It is possible to get two Meat Boys in this challenge, as seen below.

Beating Mom's Heart will complete the challenge.

Mom's Heart SMB Super Fan!

Super SMB Fan

Spider Boy! Gives you the Spider's Bite and the Mutant Spider. No Treasure Rooms.

Beating Mom's Heart will complete the challenge.

Mom's Heart Spider Butt

The Spider Butt

Isaac Was Good Today Gives you the Holy Grail and The Halo. No Treasure Rooms. If you have not unlocked Sheol, even though you have been there with the devil trapdoor, you still can't complete the challenge unless you possess We Need To Go Deeper! or a Devil Room appears. The chest will appear and you will have beaten Mom's Heart normally without completing the challenge. Satan Counterfeit Penny

The Counterfeit Coin

The Purist You start without The Dice, even if you've unlocked it. No Treasure Rooms.

You do not need to complete all of the above challenges to unlock the Daddy Long Legs item, only The Purist challenge.

This challenge (initially locked), is unlocked by defeating Isaac in the Cathedral.

Isaac Daddy's Love



  • For the 10th challenge, no trapdoor appears after beating It Lives. However, if you enter Sheol via the I AM ERROR room, by using the We Need To Go Deeper! item, or by entering the Devil/Angel Room after the fight, defeating Satan will still count as completing the challenge.



  • You still can play the challenges as any character you want. When the screen starts fading to black, quickly press the "Esc" key to return to the main menu then the "Space" key to go back to the character selection screen, then just move to the character you want to play with (do not press "Space" to actually select that character, that will cancel the challenge and start a normal game). If done correctly, you can even play with characters that you haven't unlocked yet. Example, choosing Magdalene gives you four Heart Containers and the Yum Heart and Isaac's stats.. The exception to this is that selecting Isaac will not allow you to start with The Dice, even if you have already unlocked that item. This glitch also works in normal play, outside of challenges. (This glitch seems to have been fixed in the Eternal Update, and now Isaac is the only playable character in challenges.)
  • Unlocking challenge-related achievements on Steam occasionally has some issues, usually resulting in two challenges having their corresponding achievements exchanged; For example, unlocking the Blue Candle achievement for completing "Large Marge". It is still apparently always possible to unlock all of the Steam achievements.
  • However, if you do manage to unlock the wrong achievement, you can sometimes not receive the reward for a challenge because of it, due to it randomly deciding what achievement it unlocks (e.g., If you defeat "7 Years Bad Luck" but get the achievement for "Large Marge", everything is fine. However, beating "Large Marge" may result in it working correctly, so that you would get the right corresponding achievement, but since you already unlocked the achievement for "Large Marge", it will count as not being completed, so you will receive no item and the challenge will not be crossed out on the challenge page).
  • When Challenge 1 ("Dark was the Night") is completed, you may not unlock the achievement but you can still find The Candle.
  • It is possible to complete Challenge 10 ("The Purist") via Sheol instead of the Cathedral, if you are teleported to the I AM ERROR Room on The Womb 2. Inside is a single trap door which goes to Sheol; however, if you beat Satan, the challenge will be marked as completed.
  • Getting the Curse of the Labyrinth on the goal level means that you only have to beat the first boss on the level to complete the challenge.
  • Using the We Need to Go Deeper! item to pass by the floor of the boss triggering the success of a challenge will not trigger the challenge, nor the associated achievement.


Challenges disable all achievements, so you will not earn any endings or other rewards besides the Challenge item.

Some challenges in Rebirth use other characters besides Isaac, such as Magdalene. Therefore, you can access some challenges only after unlocking certain character. Also, to unlock challenge, you need to unlock all items used in this challenge (for example, Solar System is unlocked after you unlock Transcendence)

Challenge Title Conditions Character Goal Reward
1 Pitch Black Gives you the Curse of Darkness and Curse of the Unknown - all rooms will be darker, and you will be unable to see your health for the entire challenge. Doesn't remove treasure rooms. Isaac Mom Rune of Hagalaz
2 High Brow Starts you with E. Coli, Flush, Number One and Butt Bombs. Isaac Mom Rune of Jera
3 Head Trauma Starts you with Tiny Planet, Soy Milk, and Iron Bar. Isaac Mom Rune of Ehwaz
4 Darkness Falls Starts you with Pentagram, Razor blade, Dark Matter and Sacrificial Dagger. Eve Satan Rune of Dagaz
5 The Tank Starts you off with Bucket Of Lard, Thunder Thighs, Lunch, and Infamy Magdalene Mom Rune of Ansuz

File:Rune of Ansuz.png

6 Solar System Starts you with 2 Pretty flies, Distant Admiration, Forever Alone, Beelzebub, and Transcendence. Cannot shoot tears. Isaac Mom's Heart Rune of Perthro
7 Suicide King Starts you with Mr. Mega, Ipecac and My Reflection Lazarus Isaac Suicide King
8 Cat got your Tongue? Starts you with Guppy's Head, Guppy's Tail and Guppy's Hairball Cannot shoot tears. Isaac transformed into Guppy Mom's Heart Rune of Algiz
9 Demo Man Starts you with Dr. Fetus, Remote Detonator and Match Stick. Isaac Mom's Heart Card of Chaos
10 Cursed! Starts you off with Raw Liver, Compass, Blue Map, Treasure Map, Yum Heart and the Child's Heart. Every room entrance (except special ones) changes to spiked doorway (like cursed rooms have). Doesn't remove treasure rooms. Magdalene Mom's Heart Credit Card
11 Glass Cannon Starts you off with Epic Fetus, Book of Belial, and Loki's Horns. Isaac Satan Rules Card
12 When Life Gives You Lemons Starts you off with Lemon Mishap, the Habit, the 9 Volt and a Lemon Party Pill. Isaac Mom SMB Super Fan
13 Beans! Starts you off with 9 Volt, Bean, Black Bean, Pyro, and Butt Bombs. Shooting is forbidden. Isaac Mom Burnt Penny
14 Its In The Cards Starts you of with 9 Volt, Battery, Deck Of Cards, Starter Deck, and two random Tarot Cards. Isaac Mom Card Against Humanity
15 Slow Roll Starts you off with Polyphemus, Cupid's Arrow, and My Reflection. Isaac Mom Swallowed Penny
16 Computer Savvy Starts you off with Technology, Technology 2, and Spoon Bender. Isaac Mom Robo-Baby 2.0
17 Waka Waka Starts you with Anti-Gravity and Strange Attractor. Isaac Mom Death's Touch
18 The Host Starts you off with Mulligan, Spider Baby, and Tick. Isaac Mom Technology .5
19 The Family Man You start with Brother Bobby, Sister Maggy, Rotten Baby, Best Friends Forever and Dad's Key. You are unable to fire in this challenge. Isaac Isaac Epic Fetus
20 Purist Same as the original challenge of the same name. Starts you off with no items. Isaac Mom's Heart Rune of Berkano

More to be added later. Add more if you can!

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