This article is about the Afterbirth † content updates. For the passive item, see
Booster Pack (Item).
Booster Packs were recurring content updates for The Binding of Isaac: Afterbirth †. Booster Packs contained popular community-developed mods as updates in the game continued to add features.
Booster Pack #1
The first Booster Pack was released on March 23, 2017 on PC, and contains 9 new items, 3 new trinkets, and 3 new special cards, along with some new features.[1]
Active Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
 Quality
|
| Black Hole
|
5.100.512
|
|
Nothing can escape
|
Throws a black hole on the ground which sucks in and damages enemies and destroys nearby obstacles.
|
1
|
| Mystery Gift
|
5.100.515
|
|
Wrapped up nice for you!
|
Spawns a random item from the current room's item pool, with a chance to spawn  A Lump of Coal or  The Poop instead.
|
3
|
| Sprinkler
|
5.100.516
|
|
Sprinkles.
|
Creates a stationary sprinkler for the current room that rotates and fires tears in 8 directions. The tears copy Isaac's stats and most tear effects.
|
2
|
Passive Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| Angry Fly
|
5.100.511
|
|
He's violent
|
Spawns a fly familiar that orbits around a random enemy and deals 30 damage per second to enemies it comes in contact with.
|
1
|
| Bozo
|
5.100.513
|
|
Party time!
|
+0.1 flat damage, grants a  Soul Heart. Enemies can randomly become briefly charmed or feared. Taking damage has a chance to spawn a  Rainbow Poop.
|
2
|
| Broken Modem
|
5.100.514
|
|
Lag!
|
Enemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals. The reward from clearing a room will sometimes be duplicated.
|
3
|
| Buddy in a Box
|
5.100.518
|
|
What could it be?!
|
Spawns a familiar with a random tear effect. The familiar is randomized at the start of each floor.
|
2
|
| Fast Bombs
|
5.100.517
|
|
Rapid bomb drops
|
+7  Bombs. Removes the delay between bomb placements, allowing them to be placed rapidly. Bombs will no longer knock each other away.
|
1
|
| Lil Delirium
|
5.100.519
|
|
Delirious friend
|
Grants a familiar that transforms into another random familiar every 10 seconds.
|
2
|
Trinkets
| Name
|
ID
|
Icon
|
Quote
|
Description
|
| Butter!
|
5.350.122
|
|
Can't hold it!
|
Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping an owned passive item.
|
| Hairpin
|
5.350.120
|
|
Danger charge
|
Fully recharges Isaac's active item upon entering a boss fight.
|
| Wooden Cross
|
5.350.121
|
|
My faith protects me
|
Grants a shield that negates the first damage taken once per floor.
|
Cards
| Name
|
ID
|
Icon
|
Message
|
Description
|
| Huge Growth
|
5.300.52
|
|
Become immense!
|
 For the current room, makes Isaac larger, allows him to crush obstacles he walks on, and grants +7 flat Damage and +30 Range.
For the current room, makes Isaac larger, allows him to crush obstacles he walks on, and grants +7 flat Damage and +3 Range.
|
| Ancient Recall
|
5.300.53
|
|
Draw 3 cards
|
Spawns 3 random cards.
|
| Era Walk
|
5.300.54
|
|
Savor the moment
|
For the current room, enemies are slowed, Isaac's speed is increased by 0.50, and his shot speed is decreased by 1.00.
|
Other Features
Booster Pack #2
The second Booster Pack was released on May 12, 2017 on PC, and contains 6 new items, 1 new trinket, and miscellaneous changes.[2]
Active Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| Coupon
|
5.100.521
|
|
Allow 6 weeks for delivery
|
While held, guarantees one item in every  Shop will be on sale for half price. On use, makes a random item in the current room free.
|
2
|
| Moving Box
|
5.100.523
|
|
Pack and unpack
|
If the box is empty, picks up items and pickups in a room and stores them. If the box is not empty, places all stored items and pickups in the current room. Can carry up to 10 items or pickups at once.
|
1
|
| Telekinesis
|
5.100.522
|
|
Power of the mind
|
Any enemy shots that come near Isaac for the next three seconds are held in place then fired back.
|
1
|
Passive Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| Jumper Cables
|
5.100.520
|
|
Bloody recharge
|
Grants an active item charge every 15 enemies killed.
|
3
|
| Leprosy
|
5.100.525
|
|
You're tearing me apart!
|
Upon taking damage, grants a body part as an orbital, which blocks enemy shots and deals 7 damage per tick to enemies it comes in contact with. The orbitals will be destroyed if they take enough damage from enemies or enemy shots.
|
1
|
| Technology Zero
|
5.100.524
|
|
Static tears!
|
Connects Isaac's tears with electricity that can damage enemies.
|
3
|
Trinkets
Other Features
Booster Pack #3
The third Booster Pack was released on June 30, 2017, for the PC, and contains 4 new items, and 1 trinket.
Active Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| Mr. ME!
|
5.100.527
|
|
Caaan do!
|
Summons a controllable ghost that can perform various tasks depending on what it targets.
|
3
|
Passive Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| 7 Seals
|
5.100.526
|
|
Lil harbingers!
|
Spawns a random Harbinger familiar that changes every 10 seconds. Harbingers have different behaviors and spawn themed Locusts.
|
2
|
| Angelic Prism
|
5.100.528
|
|
Eclipsed by the moon
|
Spawns an orbital familiar with a large orbital radius. Tears that pass through the prism split into four multi-colored tears.
|
3
|
| Pop!
|
5.100.529
|
|
Eyeball tears!
|
Replaces Isaac's tears with eyeballs that can bounce off of each other. The eyeballs are not limited by range, and will instead dissipate when they stop moving or when hitting an enemy or obstacle.
|
1
|
Trinkets
| Name
|
ID
|
Icon
|
Quote
|
Description
|
| Door Stop
|
5.350.124
|
|
Hold the door!
|
The last door Isaac went through stays open, allowing him to leave the room even if enemies are in it.
|
Other Features
Booster Pack #4
The fourth Booster Pack was released on October 10, 2017 and contains 5 new items, 1 new trinket, and 6 new enemies.[3]
Passive Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| Death's List
|
5.100.530
|
|
Just hope you're not next...
|
Grants a pickup or stat upgrade if all enemies in a room are killed in the order they are marked.
|
2
|
| Haemolacria
|
5.100.531
|
|
I'm seeing red...
|
Turns Isaac's tears into large blood tears fired in an arc. Upon hitting the floor, an obstacle, or an enemy, they burst into many smaller tears in all directions. Increases tear delay.
|
4
|
| Lachryphagy
|
5.100.532
|
|
Feed them!
|
Isaac's tears decelerate as they travel. Upon stopping or hitting an obstacle, they burst into 8 tears in all directions. Tears can be fired into other tears to feed them, increasing their damage.
|
2
|
| Schoolbag
|
5.100.534
|
|
Extra active item room
|
Allows Isaac to hold two active items.
|
3
|
| Trisagion
|
5.100.533
|
|
Smite thy enemy
|
Tears are replaced with piercing white blasts of light that deal less damage but can damage the same enemy multiple times.
|
3
|
Trinkets
| Name
|
ID
|
Icon
|
Quote
|
Description
|
| Extension Cord
|
5.350.125
|
|
Charged friends
|
Bolts of electricity arc between Isaac and his familiars, damaging any enemies between them.
|
Monsters
| Entity
|
ID
|
Description
|
Soul Sucker
|
61.2
|
Flies slowly towards Isaac. Spawns a vortex that fires four  Brimstone beams in the cardinal directions upon death.
|
Cross Stone Shooter
|
202.10
|
Stationary and invulnerable monster that continuously fires shots in four directions, alternating between cardinal and ordinal.
|
Tube Worm
|
244.1
|
Pops out of the ground in random locations and fires a long-range spray of arcing shots where Isaac will be.
|
Tar Boy
|
307.0
|
Fires a short-ranged spray of shots that leave behind slowing Black Creep. Occasionally burrows underground and reappears under any pools of black creep in the room. If Isaac stands on the Creep, the Tar Boy can fire shots straight upwards out of the Creep underneath Isaac/ send out a tentacle underneath Isaac.
|
Fistuloid
|
308.0
|
Flies towards Isaac in an erratic waving motion, periodically firing a blood shot towards Isaac that also knocks itself back. Upon death, fires a worm that flies off screen.
|
Gush
|
309.0
|
Stationary, harmless enemy that continually creates slowing black creep.
|
Other Features
- Most items from previous Booster Packs have new and improved graphics.
- Added 400 new rooms to better integrate the Afterbirth+ enemies (including Booster Pack #4 enemies) into the game.
Booster Pack #5
The fifth and last Booster Pack was released on April 30, 2018 and contains 1 new character, 18 new items, 3 new trinkets, 7 new enemies, and a new boss.[4]
Characters
The Forgotten is a new character added in the Booster pack.
Active Items
Passive Items
| Name
|
ID
|
Icon
|
Quote
|
Description
|
Quality
|
| Blanket
|
5.100.535
|
|
You feel Safe
|
Grants one Soul Heart. Upon entering a boss room, grants a shield that blocks one hit, then disappears.
|
2
|
| Brittle Bones
|
5.100.549
|
|
Everything hurts
|
Replaces all  Red Heart Containers with 6 empty  Bone Hearts. Upon losing a Bone Heart, Isaac fires bones in 8 directions and permanently gains a tears up. Upon losing a Bone Heart, Isaac fires bones in 8 directions and permanently gains a fire rate up.
|
3
|
| Broken Shovel
|
5.100.551
|
|
It feels cursed
|
One of two parts necessary to create  Mom's Shovel. No effect if somehow obtained on its own.
|
4
|
| Dad's Ring
|
5.100.546
|
|
Father's blessing
|
Creates a ring of light around Isaac that petrifies enemies in contact.
|
3
|
| Divorce Papers
|
5.100.547
|
|
Tears up + you feel empty
|
Grants one Bone Heart, +0.7 tears, spawns a  Mysterious Paper.
|
3
|
| Flat Stone
|
5.100.540
|
|
Skipping tears
|
Tears bounce off the floor, creating splashes. Splashes deal 25% of Isaac's tear damage to all enemies in a small area.
|
2
|
| Hallowed Ground
|
5.100.543
|
|
Portable sanctuary
|
Spawns a white poop familiar, which turns into a  White Poop when Isaac is hurt. White poop has an aura that increases tear fire rate and can block enemy shots. The aura also increases damage by 20% and gives homing.
|
1
|
| Jaw Bone
|
5.100.548
|
|
Fetch!
|
Spawns a familiar that flies through the room while firing, dealing a flat 7 contact damage to enemies and retrieving pickups.
|
1
|
| Lil Spewer
|
5.100.537
|
|
Puking buddy
|
Drops a random pill, and spawns a familiar that charges up and fires creep. Using pills changes the creep type.
|
1
|
| Marbles
|
5.100.538
|
|
Choking hazard
|
Spawns 3 random trinkets. Taking damage has a 5% chance to swallow Isaac's currently held trinket, gaining its effect permanently.
|
2
|
| Marrow
|
5.100.541
|
|
HP up?
|
Grants one Bone Heart and spawns three Red Hearts.
|
1
|
| Mystery Egg
|
5.100.539
|
|
Sacrificial insemination
|
Spawns an egg familiar, which hatches a random friendly monster when Isaac is hurt once per room. The power of the monster improves for each consecutive room cleared without taking damage.
|
1
|
| Pointy Rib
|
5.100.544
|
|
Stabbing time
|
Spawns a bone familiar that hovers back and forth in front of Isaac, dealing damage equal to Isaac's damage.
|
2
|
| Slipped Rib
|
5.100.542
|
|
Projectile shield
|
Spawns a bone familiar that circles around Isaac and reflects enemy shots.
|
2
|
Trinkets
Monsters
| Entity
|
ID
|
Description
|
Dank Charger
|
23.2
|
Slowly moves around the room, launching itself at Isaac if he gets in its line of sight. Bounces off of walls and leaves a trail of slowing Black Creep while charging.
|
Mr. Red Maw
|
35.2
|
Walks towards Isaac and attacks by launching its head towards him. Turns into a  Red Maw or Gusher upon death depending on the killed body segment. Occasionally separates at will.
|
Crispy
|
226.2
|
Slowly walks towards Isaac, but increases in speed as they take damage. Constantly passively takes damage.
|
Cross Stoney
|
302.10
|
Chases Isaac and shoots 4 tears vertically and diagonally like a  Cross Stone Shooter. Dies when the room is cleared.
Only appears in Aprils Fool (challenge #32) as replacements to regular Stoneys.
|
Leper
|
310.0
|
Alternating between walking towards and running away from Isaac. Releases a Leper Flesh each time it takes enough damage. At low health, constantly chases Isaac and leaves behind damaging red creep. Spawns a Leper Flesh and  Gusher upon death.
|
Leper Flesh
|
310.1
|
Floats slowly toward Isaac and fires a predictive projectile at him upon death.
|
Mr. Mine
|
311.0
|
Can only appear in pits. Attempts to launch itself at Isaac if he comes near. Occasionally burrows and pops up in another pit, and fires six shots in all directions upon death.
|
Bosses
Other features
- Bone Hearts, a new heart-type.
- Golden Bombs now have a pickup sound effect.
- Black Hearts now have a pickup sound effect.
- White Poop, a new poop type.
- Gaping Maws supposedly have a chance to become Broken Gaping Maws, although this never actually happens ingame.[5]
- Changes to Greed mode Angel Rooms.
- Added 817 new rooms.
- New charge bar graphics.
- New and improved graphics based on this Steam Workshop mod.
- New and improved graphics for burrowing monsters based on this Steam Workshop mod.
- Added the unlocks from the Switch version of the game.
- Added 64 new achievements, including 36 from the Switch version.
- Added 43 new Co-op Babies, 41 being cosmetic and two unlockables (Bone Baby and Bound Baby).
Gallery
Concept Art For Cells, Fused Cells, and Tissues, scrapped Booster Pack enemies by LeatherIceCream.
Trivia
- Booster Pack 3 is the only booster pack to not be featured on a blog post.
- The developers of Antibirth helped create booster packs 4 and 5.
- Many of the added Co-op Babies from Booster Pack 5 are references to popular mods that were never added in the Booster Packs.
References
Jar of Flies now changes appearance depending on how many flies are in the jar, based on this Steam Workshop mod.
Broken Modem collectible sprite was changed.
Technology Zero collectible and costume sprites were changed.
Angry Fly collectible and familiar sprites were changed.
Sprinkler collectible and entity sprites were changed.
7 Seals collectible and familiar sprites were changed. Familiar sprites were based on this Steam Workshop mod by Quartz.
Pop! collectible sprite was changed.
Hairpin trinket sprite was changed.
Butter! trinket sprite was changed.
Door Stop trinket sprite was changed.
Bony, 
Black Bony, or an orbital bone for each enemy killed in the current room.
Bone Fly, 
Revenant, or an orbital bone for each enemy killed in the current room.
The Forgotten when used on a mound of dirt that appears in 
Dark Room.
The Binding of Isaac: Rebirth
