Booster Packs

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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.

Booster Pack #1[edit | edit source]

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[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Black Hole 512
Black Hole
4 rooms
Nothing can escape Throws a black hole on the ground which sucks in and damages enemies.
Added in Afterbirth † Mystery Gift 515
Mystery Gift
One time use
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.
Added in Afterbirth † Sprinkler 516
Sprinkler
4 rooms
Sprinkles. Upon use, spawns a sprinkler that rotates and fires tears.

Passive Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Angry Fly 511 Angry Fly 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.
Added in Afterbirth † Bozo 513 Bozo 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.
Added in Afterbirth † Broken Modem 514 Broken Modem Lag! Enemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals.
Added in Afterbirth † Buddy in a Box 518 Buddy in a Box What could it be?! Grants a familiar with a random tear effect. The familiar is randomized at the start of each floor.
Added in Afterbirth † Fast Bombs 517 Fast Bombs Rapid bomb drops Grants 7 bombs and allows bombs to be placed rapidly.
Added in Afterbirth † Lil Delirium 519 Lil Delirium Delirious friend Grants a familiar that transforms into another random familiar every 10 seconds.

Trinkets[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Hairpin 120 Hairpin Danger charge Fully recharges Isaac's active item upon entering a boss fight.
Added in Afterbirth † Wooden Cross 121 Wooden Cross My faith protects me Grants a Holy Mantle shield upon entering a new floor, which protects against one hit of damage.
Added in Afterbirth † Butter! 122 Butter! 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.

Cards[edit | edit source]

Name ID Icon Message Effect
Added in Afterbirth † Huge Growth 52 Huge Growth Icon.png Become immense! Makes Isaac large for the current room, increasing his range and damage.
Added in Afterbirth † Ancient Recall 53 Ancient Recall Icon.png Draw 3 cards Spawns 3 random cards.
Added in Afterbirth † Era Walk 54 Era Walk Icon.png Savor the moment For the current room, enemies are slowed, Isaac's speed is increased, and his shot speed is decreased.

Other Features[edit | edit source]

Booster Pack #2[edit | edit source]

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[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Coupon 521
Coupon
6 rooms
Allow 6 weeks for delivery Upon use, makes a random item from a shop, devil deal, or black market free.
Added in Afterbirth † Telekinesis 522
Telekinesis
3 seconds
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.
Added in Afterbirth † Moving Box 523
Moving Box
4 rooms
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.

Passive Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Jumper Cables 520 Jumper Cables Bloody recharge Grants an active item charge every 15 enemies killed.
Added in Afterbirth † Leprosy 525 Leprosy 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.
Added in Afterbirth † Technology Zero 524 Technology Zero Static tears! Connects Isaac's tears with electricity that can damage enemies.

Trinkets[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Filigree Feather 123 Filigree Feather Angelic Spoils! Angels drop items instead of key pieces when defeated.

Other Features[edit | edit source]

Booster Pack #3[edit | edit source]

The third Booster Pack was released on June 30, 2017 on PC, and contains 4 new items, and 1 trinket.

Active Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Mr. ME! 527
Mr. ME!
4 rooms
Caaan do! Summons a controllable ghost that can perform various tasks depending on what it targets.

Passive Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † 7 Seals 526 7 Seals Lil harbingers! Grants a random Harbinger familiar that changes every 10 seconds.
Added in Afterbirth † Angelic Prism 528 Angelic Prism 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.
Added in Afterbirth † Pop! 529 Pop! 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.

Trinkets[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Door Stop 124 Door Stop 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[edit | edit source]

Booster Pack #4[edit | edit source]

The fourth Booster Pack was released on October 10, 2017 and contains 5 new items, 1 trinket, and 6 new enemies.[3]

Passive Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Death's List 530 Death's List Just hope you're not next... Grants a reward if all enemies in a room are killed in the order they are marked.
Added in Afterbirth † Haemolacria 531 Haemolacria 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.
Added in Afterbirth † Lachryphagy 532 Lachryphagy 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.
Added in Afterbirth † Schoolbag 534 Schoolbag Extra active item room Allows Isaac to hold two active items.
Added in Afterbirth † Trisagion 533 Trisagion Smite thy enemy Tears are replaced with piercing white blasts of light.

Trinkets[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Extension Cord 125 Extension Cord Charged friends Beams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them.

Monsters[edit | edit source]

Monster Description
Cross Grimace
Cross Grimace
Added in Afterbirth †
Stationary and invulnerable monster that continuously fires shots in four directions.
Fistuloid
Fistuloid
Added in Afterbirth †
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
Gush
Added in Afterbirth †
Stationary, harmless enemy that continually creates slowing black creep.
Soul Sucker
Soul Sucker
Added in Afterbirth †
Flies slowly towards Isaac. Spawns a vortex that fires four Brimstone beams in the cardinal directions upon death.
Tar Boy
Tar Boy
Added in Afterbirth †
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
Tube Worm
Added in Afterbirth †
Pops out of the ground in random locations and fires a long-range spray of arcing shots.

Other Features[edit | edit source]

  • Most items from previous Booster Packs have new and improved graphics.
    • Broken Modem Broken ModemBroken Modem Icon.pngEnemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals. collectible sprite was changed.
    • Technology Zero Technology ZeroTechnology Zero Icon.pngConnects Isaac's tears with electricity that can damage enemies. collectible and costume sprites were changed.
    • Angry Fly Angry FlyAngry Fly Icon.pngSpawns 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 SprinklerSprinkler Icon.png4 roomsUpon use, spawns a sprinkler that rotates and fires tears. collectible and entity sprites were changed.
    • 7 Seals 7 Seals7 Seals Icon.pngGrants 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! Pop!Pop! Icon.pngReplaces 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 HairpinHairpin Icon.pngFully recharges Isaac's active item upon entering a boss fight. trinket sprite was changed.
    • Butter! Butter!Butter! Icon.pngUsing 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 Door StopDoor Stop Icon.pngThe 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.

Booster Pack #5[edit | edit source]

The fifth and last Booster Pack has been released on April 30, 2018.[4]

Characters[edit | edit source]

The Forgotten is a new character added in the Booster pack.

Active Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Book of the Dead 545
Book of the Dead
4 rooms
Rise from the grave Upon use, spawns a charmed Bony or an orbital bone for each enemy killed in the current room.
Added in Afterbirth † Broken Shovel 550
Broken Shovel
4 rooms
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.
Added in Afterbirth † Mom's Shovel 552
Mom's Shovel
4 rooms
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 The Dark Room.
Added in Afterbirth † Sacrificial Altar 536
Sacrificial Altar
One time use
He demands a sacrifice Upon use, sacrifices up to 2 familiars and spawns an item from the Devil Room Pool for each familiar sacrificed.

Passive Items[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Blanket 535 Blanket You feel Safe Grants one soul heart. Upon entering a boss room, grants a shield that blocks one hit, then disappears.
Added in Afterbirth † Brittle Bones 549 Brittle Bones 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.
Added in Afterbirth † Broken Shovel 551 Broken Shovel It feels cursed One of two parts necessary to create Mom's Shovel.
Added in Afterbirth † Dad's Ring 546 Dad's Ring Father's blessing Creates a ring of light around Isaac that petrifies enemies in contact.
Added in Afterbirth † Divorce Papers 547 Divorce Papers Tears up + you feel empty Spawns a Mysterious Paper, increases tears, and grants a bone heart.
Added in Afterbirth † Flat Stone 540 Flat Stone 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.
Added in Afterbirth † Hallowed Ground 543 Hallowed Ground Portable sanctuary Spawns a white poop familiar, which turns into a white poop when Isaac is hurt.
Added in Afterbirth † Jaw Bone 548 Jaw Bone Fetch! Spawns a familiar that flies the room while firing, dealing double Isaac's tear damage to enemies that come in contact and retrieving pickups.
Added in Afterbirth † Lil Spewer 537 Lil Spewer Puking buddy Spawns a random pill, and grants a small Spewer familiar that charges up and fires different types of creep.
Added in Afterbirth † Marbles 538 Marbles Choking hazard Spawns 3 random trinkets. Taking damage has a small chance to swallow Isaac's currently held trinket, gaining its effect permanently.
Added in Afterbirth † Marrow 541 Marrow HP up? Grants one bone heart and spawns three red heart pickups.
Added in Afterbirth † Mystery Egg 539 Mystery Egg Sacrificial insemination Spawns an egg familiar, which cracks and turns into a random charmed enemy when Isaac is hurt. The egg regenerates upon entering a different room.
Added in Afterbirth † Pointy Rib 544 Pointy Rib Stabbing time Spawns a bone familiar that can be aimed with the fire buttons and does contact damage.
Added in Afterbirth † Slipped Rib 542 Slipped Rib Projectile shield Spawns a bone familiar that circles around Isaac and reflects enemy shots.

Trinkets[edit | edit source]

Name ID Icon Quote Description
Added in Afterbirth † Rotten Penny 126 Rotten Penny Wealth of flies Spawns a blue fly every time a coin is picked up.
Added in Afterbirth † Baby-Bender 127 Baby-Bender Feed them magic! Grants Isaac's familiars homing shots.
Added in Afterbirth † Finger Bone 128 Finger Bone It looks brittle Grants a chance to gain a bone heart upon taking damage.

Monsters[edit | edit source]

Monster Description
Crispy
Crispy
Added in Afterbirth †
Slowly walks towards Isaac, but increases in speed as they take damage. Constantly passively takes damage.
Cross Stoney
Cross Stoney
Added in Afterbirth †
Chases Isaac and shoots 4 tears vertically and diagonally like a Cross Grimace. Dies when the room is cleared.
Dank Charger
Dank Charger
Added in Afterbirth †
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
Leper
Added in Afterbirth †
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 head chunk and Gusher upon death.
Mr. Mine
Mr. Mine
Added in Afterbirth †
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
Mr. Red Maw
Added in Afterbirth †
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.

Bosses[edit | edit source]

Boss The Matriarch.png
The Matriarch

Other features[edit | edit source]

Gallery[edit | edit source]

Trivia[edit | edit source]

  • 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.
  • Most booster pack items have to be unlocked.
  • The Switch and PS4 Versions are two Booster packs behind so far.
  • Many of the added Co-op Babies from Booster Pack 5 are references to popular mods that were never added in the Booster Packs.
  • The use of the term Booster Pack to refer to content updates of the game now that official development of the game is over is similar to its original usage in reference to getting card packs to add to one's card collection.

References[edit | edit source]


Moving Box Icon.png Added in Afterbirth † Booster Packs Moving Box Icon.png
#1
  • Angry FlyAngry FlySpawns a fly familiar that orbits around a random enemy and deals 5 damage per tick to enemies it comes in contact with.
  • Black HoleBlack HoleThrows a black hole on the ground which sucks in and damages enemies.
  • BozoBozoIncreases 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 ModemBroken ModemEnemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals.
  • Mystery GiftMystery GiftUpon 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.
  • SprinklerSprinklerUpon use, spawns a sprinkler that rotates and fires tears.
  • Fast BombsFast BombsGrants 7 bombs and allows bombs to be placed rapidly.
  • Buddy in a BoxBuddy in a BoxGrants a familiar with a random tear effect. The familiar is randomized at the start of each floor.
  • Lil DeliriumLil DeliriumGrants a familiar that transforms into another random familiar every 10 seconds.
  • HairpinHairpinFully recharges Isaac's active item upon entering a boss fight.
  • Wooden CrossWooden CrossGrants a Holy Mantle shield upon entering a new floor, which protects against one hit of damage.
  • Butter!Butter!Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping a passive item.
  • Huge GrowthHuge GrowthMakes Isaac large for the current room, increasing his range and damage.
  • Ancient RecallAncient RecallSpawns 3 random cards.
  • Era WalkEra WalkFor the current room, enemies are slowed, Isaac's speed is increased, and his shot speed is decreased.
#2
  • Jumper CablesJumper CablesGrants an active item charge every 15 enemies killed.
  • CouponCouponUpon use, makes a random item from a shop, devil deal, or black market free.
  • TelekinesisTelekinesisUpon 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 BoxMoving BoxIf 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.
  • Technology ZeroTechnology ZeroConnects Isaac's tears with electricity that can damage enemies.
  • LeprosyLeprosyUpon 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.
  • Filigree FeatherFiligree FeatherAngels drop items instead of key pieces when defeated.
  • Dressing Table.png
#3
  • 7 Seals7 SealsGrants a random Harbinger familiar that changes every 10 seconds.
  • Mr. ME!Mr. ME!Summons a controllable ghost that can perform various tasks depending on what it targets.
  • Angelic PrismAngelic PrismGrants a prism orbital with a large orbital radius. Tears that pass through the prism split into four multi-colored tears.
  • Pop!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.
  • Door StopDoor StopThe last door Isaac went through stays open, allowing him to leave the room even if enemies are in it.
#4
  • Death's ListDeath's ListGrants a reward if all enemies in a room are killed in the order they are marked.
  • HaemolacriaHaemolacriaTears 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.
  • LachryphagyLachryphagyIsaac'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.
  • TrisagionTrisagionTears are replaced with piercing white blasts of light.
  • SchoolbagSchoolbagAllows Isaac to hold two active items.
  • Extension CordExtension CordBeams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them.
#5
  • BlanketBlanketGrants one soul heart. Upon entering a boss room, grants a shield that blocks one hit, then disappears.
  • Sacrificial AltarSacrificial AltarUpon use, sacrifices up to 2 familiars and spawns an item from the Devil Room Pool for each familiar sacrificed.
  • Lil SpewerLil SpewerSpawns a random pill, and grants a small Spewer familiar that charges up and fires different types of creep.
  • MarblesMarblesSpawns 3 random trinkets. Taking damage has a small chance to swallow Isaac's currently held trinket, gaining its effect permanently.
  • Mystery EggMystery EggSpawns an egg familiar, which cracks and turns into a random charmed enemy when Isaac is hurt. The egg regenerates upon entering a different room.
  • Flat StoneFlat StoneTears 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.
  • MarrowMarrowGrants one bone heart and spawns three red heart pickups.
  • Slipped RibSlipped RibSpawns a bone familiar that circles around Isaac and reflects enemy shots.
  • Hallowed GroundHallowed GroundSpawns a white poop familiar, which turns into a white poop when Isaac is hurt.
  • Pointy RibPointy RibSpawns a bone familiar that can be aimed with the fire buttons and does contact damage.
  • Book of the DeadBook of the DeadUpon use, spawns a charmed Bony or an orbital bone for each enemy killed in the current room.
  • Dad's RingDad's RingCreates a ring of light around Isaac that petrifies enemies in contact.
  • Divorce PapersDivorce PapersSpawns a Mysterious Paper, increases tears, and grants a bone heart.
  • Jaw BoneJaw BoneSpawns a familiar that flies the room while firing, dealing double Isaac's tear damage to enemies that come in contact and retrieving pickups.
  • Brittle BonesBrittle BonesReplaces 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 ShovelBroken ShovelWhile held, causes multiple Mom's Foots to come down and stomp on Isaac. One of two parts necessary to create Mom's Shovel.
  • Broken ShovelBroken ShovelOne of two parts necessary to create Mom's Shovel.
  • Mom's ShovelMom's ShovelSpawns a trapdoor that leads to the next floor upon activation. Unlocks The Forgotten when used on a mound of dirt that appears in The Dark Room.
  • Rotten PennyRotten PennySpawns a blue fly every time a coin is picked up.
  • Baby-BenderBaby-BenderGrants Isaac's familiars homing shots.
  • Finger BoneFinger BoneGrants a chance to gain a bone heart upon taking damage.
  • The Forgotten App.png


The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
MainPageAchievements.png Achievements MainPageAttributes.png Attributes MainPageBosses.png Bosses TarotCard.png Cards and Runes MainPageChallenges.png Challenges MainPageChapters.png Chapters
Isaac App.png Characters MainPageBabies.png Co-op MainPageItems Small.png Items Item Pools Item Pools MainPageMonsters.png Monsters MainPageObjects.png Objects
Red heart.png Pickups BlueBlue.png Pills MainPageRooms.png Rooms MainPageSeeds2.png Seeds Guppy App.png Transformations The Left Hand Icon.png Trinkets