Booster Packs are recurring content updates for The Binding of Isaac: Afterbirth †. Booster Packs contain high-quality, popular, and balanced community-developed mods as updates in the game to continue to add features.
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]
Name
|
ID
|
Icon
|
Quote
|
Description
|
Black Hole
|
512
|
|
Nothing can escape
|
Throws a black hole on the ground which sucks in and damages enemies.
|
Mystery Gift
|
515
|
|
Wrapped up nice for you!
|
Upon use, spawns a random item from the current room's item pool, with a chance to spawn A Lump of Coal or The Poop instead.
|
Sprinkler
|
516
|
|
Sprinkles.
|
Upon use, spawns a sprinkler that rotates and fires tears.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Angry Fly
|
511
|
|
He's violent
|
Spawns a fly familiar that orbits around a random enemy and deals 5 damage per tick to enemies it comes in contact with.
|
Bozo
|
513
|
|
Party time!
|
Increases damage by a flat 0.1 and grants a soul heart. Enemies can randomly become briefly charmed or feared. Taking damage has a chance to spawn a rainbow poop.
|
Broken Modem
|
514
|
|
Lag!
|
Enemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals.
|
Buddy in a Box
|
518
|
|
What could it be?!
|
Grants a familiar with a random tear effect. The familiar is randomized at the start of each floor.
|
Fast Bombs
|
517
|
|
Rapid bomb drops
|
Grants 7 bombs and allows bombs to be placed rapidly.
|
Lil Delirium
|
519
|
|
Delirious friend
|
Grants a familiar that transforms into another random familiar every 10 seconds.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Hairpin
|
120
|
|
Danger charge
|
Fully recharges Isaac's active item upon entering a boss fight.
|
Wooden Cross
|
121
|
|
My faith protects me
|
Grants a Holy Mantle shield upon entering a new floor, which protects against one hit of damage.
|
Butter!
|
122
|
|
Can't hold it!
|
Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping a passive item.
|
Name
|
ID
|
Icon
|
Message
|
Effect
|
Huge Growth
|
52
|
|
Become immense!
|
Makes Isaac large for the current room, increasing his range and damage.
|
Ancient Recall
|
53
|
|
Draw 3 cards
|
Spawns 3 random cards.
|
Era Walk
|
54
|
|
Savor the moment
|
For the current room, enemies are slowed, Isaac's speed is increased, and his shot speed is decreased.
|
The second Booster Pack was released on May 12, 2017 on PC, and contains 6 new items, 1 new trinket, and miscellaneous changes.[2]
Name
|
ID
|
Icon
|
Quote
|
Description
|
Coupon
|
521
|
|
Allow 6 weeks for delivery
|
Upon use, makes a random item from a shop, devil deal, or black market free.
|
Telekinesis
|
522
|
|
Power of the mind
|
Upon use, for the next two seconds, any enemy shots that come near Isaac are held in place. After the charge is depleted, they are fired back as tears.
|
Moving Box
|
523
|
|
Pack and unpack
|
If the box is empty, picks up all 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.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Jumper Cables
|
520
|
|
Bloody recharge
|
Grants an active item charge every 15 enemies killed.
|
Leprosy
|
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.
|
Technology Zero
|
524
|
|
Static tears!
|
Connects Isaac's tears with electricity that can damage enemies.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Filigree Feather
|
123
|
|
Angelic Spoils!
|
Angels drop items instead of key pieces when defeated.
|
- Angel Rooms were rebalanced - they contain more items but only a single one can be collected.
- Mods no longer disable achievements after beating Mom once. This includes use of the Debug Console.
- Active items now charge during Challenge Room waves.
- Multiple items that affect the appearance of bombs now stack visually, based on this Steam Workshop mod.
Jar of Flies
Every time Isaac kills an enemy, a fly will be added to the jar, up to a maximum of 20. Using the Jar of Flies will release all the flies that are currently in the jar as friendly blue flies that will damage enemies. now changes appearance depending on how many flies are in the jar, based on this Steam Workshop mod.
- Added Mom's Dressing Table, which changes Isaac's appearance to only reflect a few of his items, based on this Steam Workshop mod.
- Added the Stompy transformation.
The third Booster Pack was released on June 30, 2017 on PC, and contains 4 new items, and 1 trinket.
Name
|
ID
|
Icon
|
Quote
|
Description
|
Mr. ME!
|
527
|
|
Caaan do!
|
Summons a controllable ghost that can perform various tasks depending on what it targets.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
7 Seals
|
526
|
|
Lil harbingers!
|
Grants a random Harbinger familiar that changes every 10 seconds.
|
Angelic Prism
|
528
|
|
Eclipsed by the moon
|
Grants a prism orbital with a large orbital radius. Tears that pass through the prism split into four multi-colored tears.
|
Pop!
|
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.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Door Stop
|
124
|
|
Hold the door!
|
The last door Isaac went through stays open, allowing him to leave the room even if enemies are in it.
|
The fourth Booster Pack was released on October 10, 2017 and contains 5 new items, 1 new trinket, and 6 new enemies.[3]
Name
|
ID
|
Icon
|
Quote
|
Description
|
Death's List
|
530
|
|
Just hope you're not next...
|
Grants a reward if all enemies in a room are killed in the order they are marked.
|
Haemolacria
|
531
|
|
I'm seeing red...
|
Tears are now 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.
|
Lachryphagy
|
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.
|
Schoolbag
|
534
|
|
Extra active item room
|
Allows Isaac to hold two active items.
|
Trisagion
|
533
|
|
Smite thy enemy
|
Tears are replaced with piercing white blasts of light.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Extension Cord
|
125
|
|
Charged friends
|
Beams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them.
|
Monster
|
Description
|
Cross Stone Shooter

|
Stationary and invulnerable monster that continuously fires shots in four directions.
|
Fistuloid

|
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

|
Stationary, harmless enemy that continually creates slowing black creep.
|
Soul Sucker

|
Flies slowly towards Isaac. Spawns a vortex that fires four Brimstone beams in the cardinal directions upon death.
|
Tar Boy

|
Pops out of the ground in random locations and fires a short-ranged spray of shots that leave behind slowing black creep. If Isaac stands in the creep, the Tar Boy can fire shots straight upwards out of the creep underneath Isaac.
|
Tube Worm

|
Pops out of the ground in random locations and fires a long-range spray of arcing shots.
|
- Most items from previous Booster Packs have new and improved graphics.
Broken Modem
Enemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals. collectible sprite was changed.
Technology Zero
Connects Isaac's tears with electricity that can damage enemies. collectible and costume sprites were changed.
Angry Fly
Spawns a fly familiar that orbits around a random enemy and deals 5 damage per tick to enemies it comes in contact with. collectible and familiar sprites were changed.
Sprinkler
Upon use, spawns a sprinkler that rotates and fires tears. collectible and entity sprites were changed.
7 Seals
Grants a random Harbinger familiar that changes every 10 seconds. collectible and familiar sprites were changed. Familiar sprites were based on this Steam Workshop mod by Quartz.
Pop!
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. collectible sprite was changed.
Hairpin
Fully recharges Isaac's active item upon entering a boss fight. trinket sprite was changed.
Butter!
Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping a passive item. trinket sprite was changed.
Door Stop
The last door Isaac went through stays open, allowing him to leave the room even if enemies are in it. trinket sprite was changed.
- Added 400 new rooms to better integrate the Afterbirth+ enemies (including Booster Pack #4 enemies) into the game.
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]
The Forgotten is a new character added in the Booster pack.
Name
|
ID
|
Icon
|
Quote
|
Description
|
Book of the Dead
|
545
|
|
Rise from the grave
|
Upon use, spawns a friendly Bony or an orbital bone for each enemy killed in the current room.
|
Broken Shovel
|
550
|
|
It feels cursed
|
While held, causes multiple Mom's Foots to come down and stomp on Isaac. One of two parts necessary to create Mom's Shovel.
|
Mom's Shovel
|
552
|
|
Lost but not forgotten
|
Spawns a trapdoor that leads to the next floor upon activation. Unlocks The Forgotten when used on a mound of dirt that appears in Dark Room.
|
Sacrificial Altar
|
536
|
|
He demands a sacrifice
|
Upon use, sacrifices up to 2 familiars and spawns an item from the Devil Room Pool for each familiar sacrificed.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Blanket
|
535
|
|
You feel Safe
|
Grants one soul heart. Upon entering a boss room, grants a shield that blocks one hit, then disappears.
|
Brittle Bones
|
549
|
|
Everything hurts
|
Replaces all red hearts with 6 empty bone hearts. Upon losing a bone heart, Isaac fires bones in 8 directions and permanently gains a tears up.
|
Broken Shovel
|
551
|
|
It feels cursed
|
One of two parts necessary to create Mom's Shovel.
|
Dad's Ring
|
546
|
|
Father's blessing
|
Creates a ring of light around Isaac that petrifies enemies in contact.
|
Divorce Papers
|
547
|
|
Tears up + you feel empty
|
Spawns a Mysterious Paper, increases tears, and grants a bone heart.
|
Flat Stone
|
540
|
|
Skipping tears
|
Tears bounce off the floor. Tears that hit an enemy after bouncing deal splash damage to all nearby enemies for 25% of Isaac's tear damage.
|
Hallowed Ground
|
543
|
|
Portable sanctuary
|
Spawns a white poop familiar, which turns into a white poop when Isaac is hurt.
|
Jaw Bone
|
548
|
|
Fetch!
|
Spawns a familiar that flies the room while firing, dealing a flat 7 damage to enemies that come in contact and retrieving pickups.
|
Lil Spewer
|
537
|
|
Puking buddy
|
Spawns a random pill, and grants a small Spewer familiar that charges up and fires different types of creep.
|
Marbles
|
538
|
|
Choking hazard
|
Spawns 3 random trinkets. Taking damage has a small chance to swallow Isaac's currently held trinket, gaining its effect permanently.
|
Marrow
|
541
|
|
HP up?
|
Grants one bone heart and spawns three red heart pickups.
|
Mystery Egg
|
539
|
|
Sacrificial insemination
|
Spawns an egg familiar, which cracks and turns into a random friendly enemy when Isaac is hurt. The egg regenerates upon entering a different room.
|
Pointy Rib
|
544
|
|
Stabbing time
|
Spawns a bone familiar that can be aimed with the fire buttons and does contact damage.
|
Slipped Rib
|
542
|
|
Projectile shield
|
Spawns a bone familiar that circles around Isaac and reflects enemy shots.
|
Name
|
ID
|
Icon
|
Quote
|
Description
|
Rotten Penny
|
126
|
|
Wealth of flies
|
Spawns a blue fly every time a coin is picked up.
|
Baby-Bender
|
127
|
|
Feed them magic!
|
Grants Isaac's familiars homing shots.
|
Finger Bone
|
128
|
|
It looks brittle
|
Grants a chance to gain a bone heart upon taking damage.
|
Monster
|
Description
|
Crispy

|
Slowly walks towards Isaac, but increases in speed as they take damage. Constantly passively takes damage.
|
Cross Stoney

|
Chases Isaac and shoots 4 tears vertically and diagonally like a Cross Grimace. Dies when the room is cleared. Only appears in challenge #32 (Aprils Fool) as replacements to regular Stoneys.
|
Dank Charger

|
Slowly moves around the room, charging at Isaac very rapidly when he gets in its line of sight, leaving a trail of slowing black creep.
|
Leper

|
Walks around the room, avoiding Isaac. Releases a Leper Flesh for every 15 damage taken. After being reduced to 15 health, starts chasing Isaac and leaves damaging red creep. Spawns a Leper Flesh and Gusher upon death.
|
Leper Flesh

|
Moves erratically and chases Isaac. Fires a blood shot at Isaac upon death.
|
Mr. Mine

|
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.
|
Mr. Red Maw

|
Walks towards Isaac and attacks by launching its head towards Isaac. Turns into a Red Maw or Gusher upon death depending on the killed body segment. Occasionally separates at will.
|
- 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 have a chance to become Broken Gaping Maws.[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).
Concept Art For Cells, Fused Cells, and Tissues, scrapped Booster Pack enemies by LeatherIceCream.
- Booster Pack 3 is the only booster pack to not get its own 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.