Retribution – Guide

Overview

A guide to the characters, items, console commands, and more for Retribution.A very comprehensive, unofficial, Russian wiki is available here.[moddingofisaac.fandom.com]

Notice

As of the 1.17 Gacha Update, this guide is no longer up to date and fully factual. For full item effects we recommend installing either Encyclopedia, or External Item Descriptions. At some point after the release of the Repentance edition of Retribution, this guide may be updated, or migrated to a more suitable platform.

Thank you for understanding.

Icarus

• Starts with two red hearts and one eternal heart.
• Starts with Wax Wing and Communion.
• Curse of the Sun: many monsters are transformed into their stronger variants.

Mom’s Heart and Full Completion require Hard mode, all others with exception to Greed(ier) mode only require Normal difficulty. Press Tab to view unlock progress.

• Boss Rush: Wax Wing
• Mom’s Heart: Heart Worm
• Isaac: Baptismal Shell
• ???: Baptismal Font
• Satan: Blood of Satan
• Lamb: Kapala
• Mega Satan: Goat eye
• Hush: Shattered Dice
• Delirium: Rapture
• Ultra Greed: Shycoin
• Ultra Greedier: Pyrite
• All: Hundred Dollar Steak

Mammon

• Starts with two red hearts and one black heart.
• Starts with Spoils Pouch and Meat Grinder.
• Curse of Swine: treasure rooms contain only money (and the occasional pig), deals with the Devil or Angels cost half your coins.

Mom’s Heart and Full Completion require Hard mode, all others with exception to Greed(ier) mode only require Normal difficulty. Press Tab to view unlock progress.

• Boss Rush: Snap Bang
• Mom’s Heart: Thick Skin
• Isaac: Stained Shard
• ???: Carapace
• Satan: Booster Shot
• Lamb: Eye of Balor
• Mega Satan: Bell of Circe
• Hush: Bottled Fairy
• Delirium: Glioma
• Ultra Greed: Spoils Pouch
• Ultra Greedier: Meat Grinder
• All: Technology Omicron

Active Items

Icon

Name

Max Charge

Effect

Baptismal Font

4

Transforms all monsters into their weaker variants.

Black Box

3

+4 luck whilst holding, reduces luck by 0.5 each use.
Chance to spawn either spiders or a collectible proportionate to luck.

Bell of Circe

Chargeless

On use, a random being is transformed into a pig.
If the bell transforms the user, the bell may not be used until the next room.

Black Hammer

3

Tears are replaced by numbers 1-9, the same number cannot appear twice in a row.
Tear damage scales from x1/4 to x2 from 1-8 and triples on 9.
Some numbers have additional effects.

Book of Genesis

3

Passively doubles damage taken.
Grants one black heart upon use.

Book of Mormon

2

Raise the book, inflicting fear in a large radius until put away.

Bottled Fairy

One-time Use

On use, consume the fairy inside and restore full health.
Dying while the item is held will release the fairy, reviving the player to full.

Communion

6 Seconds

Reverses the trajectory of all enemy projectiles and transforms them into homing tears.

Death Cap

4

Damages the player and grants the following stat changes per bite:
-0.35 damage, -0.06 speed, -0.06, shotspeed
+5% chance to fire poison tears

Once fully consumed, grants major stat upgrades and full health:
+2.75 damage, damage x1.5, +0.5 speed, +0.5 shotspeed

False Idol

3

Grants +10.9 luck for the current room.

Lily

12 Seconds

Detonates enemies with 30% or less health remaining (signified by red flash).

Meat Grinder

6

Damages the player and spawns a swine beggar.

Modelling Clay

Chargeless

Copies the passive item or familiar nearest to the player. Resets at the beginning of each floor, removing the granted item.
The granted item is also removed if Modelling Clay is drop or swapped with a new active item.

Pumpkin Mask

One-time Use

Grants maximum soul hearts.
Forces the player to fire a brimstone beam each minute afterwards, inflicting damage.

Shattered Dice

One-time Use

Passively rerolls any items obtained while held.
Using the item will destroy it, producing a few coins and a shattered shard.

Snap Bang

4 Seconds

Drops a snap bang, which detonates on enemy contact and inflicts confusion.

Stained Shard

1

Spawns a circle of protective glass shards.
Each shard blocks one projectile before breaking and inflicts damage and bleeding onto enemies.

Passive Items (A-E)

Icon

Name

Effect

Arrow of Light

Knockback up, shotspeed +0.5, fire delay x0.93
Tears illuminate and pierce in darkness.

Axolotl

Trailing familiar that fires tears and blocks enemy projectiles.
After taking enough damage, the Axolotl dies and its body periodically spawns a blue fly.

Azazel’s Horn

+1 Black heart
Black hearts trigger at half-heart intervals.

Bad Apple

Fire delay x0.8, chance to fire a rotten apple which reduces the damage of all tears on-screen.

Baptismal Shell

Chance to fire a tear that transforms monsters into a weaker variant.

Bar of Soap

Health up, grants a soul heart at the start of every floor.

Baron Fly

Orbits around the player. After absorbing enough projectiles, hurls a spread of tears towards the nearest enemy.

Bedbug

Orbital that only moves upon blocking an enemy projectile.

Blood of Satan

Damage +0.66, replenishes all red and bone hearts. Always costs three soul hearts.

Bob’s Heart

Follows the player and explodes upon contact with an enemy.
Respawns after six seconds.
Having any number of Bob’s Heart will also grant a single companion familiar, Bob’s Intestines, which poisons enemies on contact.

Booster Shot

Tears pierce, increasing in damage for each enemy impacted.

Bucket of Blood

Increases health by three and rerolls all hearts.

Cactus

Spawns in a random location each room, absorbing projectiles, and dealing contact damage to enemies until it bursts.
Respawns after a few seconds.

Caduceus

Soul hearts heal for an additional half red heart.

Carapace

Speed x0.85 and damage +1 while active.
Blocks one projectile before breaking. Regenerates each room.

Cataract

Tear size up. Tears decelerate quickly until stopping completely.

Celestial Berry

Grants an eternal heart. A strawberry spawns in each room, flying away after three seconds and granting +1.5 damage and flight if caught.

Chastity Belt

Grants +2/(#keys + 1) damage.

Chimerism

+2 health and damage, place two bombs for the price of one.

Cholera

+1 luck.
Chance to fire a tear that transforms enemies into poop.

Chunk of Tofu

A slower, more powerful cube of meat variant. Once obtained, replaces all future boss items with itself.

Coil

Orbiting familiar that jumps further away from the player on blocking a projectile.
Constantly gravitates back.

Cootie

Attaches itself to the enemy with the highest % health in a room, charming them.
Ignores bosses.

Cracked Infamy

Slight chance to trigger the glowing hourglass effect on taking damage.
Will not activate when fighting a “final” boss.

Cyst

The first tear fired in a room deals ×10 damage.

Dead Lung

Grants a black heart. Create a large pool of blood on taking damage.

Defibrillator

Alternates between a ×0.85 and ×1.5 damage multiplier each room.

Effigy

???

Empiric

Doubles the size and effects of pills.

Eternal Bombs

Bombs deal ×2 damage to bosses.

Eye of Balor

Hangs over the enemy with the least amount of health.
Deal additional damage to that enemy.

Passive Items (E-R)

Icon

Name

Effect

Eve’s Nail Polish

Damaging an enemy reduces tear delay.

False Promise

Luck +1.09.

F.O.P.

Heart containers turn into bone hearts after losing all health.

Forbidden Fruit

Massive damage up, future damage upgrades are diminished.
(Damage x0.65, then +5)

Frail Fly

Powerful orbiting familiar that dies upon blocking too many projectiles.

Friend Folio

Gain a random Retribution familiar each room, for that room.
An exclusive familiar, Friend, may also appear.

Friendly Monster

Orbits around a random enemy and fires tears in the same direction as the player.

Guppy’s Pride

Gain a random cat familiar at the start of each floor. What’s up with that?

Glioma

Tears have a 15% chance to inflict confusion.
After deating the boss, all rooms are reset.

Ham

Stats up! (+1 Heat container; +2 Black hearts; +0.75 Damage; +5 Range)
Unusual methods of acquiring.

Heart-Shaped Balloon

Trails behind the player and pops on taking damage, spawning a heart.

Hundred Dollar Steak

Grants one heart container after thirty minutes.

Hyperopia

Tears accelerate, piercing through enemies after gaining enough speed.

Joyful

Taking damage three times in a room will multiply damage ×2.

Kapala

Damage x1.5, enemies of the same type have their health pooled together.

Laughing Gas

Shot-speed +0.3, fire delay -1.

Lemon Head

Fire delay x0.75, tear size down.

Lent

Picking up no hearts on a floor grants full health and +0.5 damage upon starting a new floor.

Mad Onion

Chance to fire high-damage tears.
High damage tears have any special effects removed.

Mark of Cain

Doors in uncleared rooms open after only ten seconds.

Milk Teeth

Fire teeth that burst into many smaller blood tears after travelling a distance.
Fire delay x2.

Moxy’s Head

Damage ×1.2

Mustard Seed

All stats up! Effect is reapplied if the player completes a floor without picking up any pedestal items.
(+1 Heart container, +0.6 damage, fire delay x0.75, +0.2 speed).

Old Bell

+3 damage, diminishes each floor.

Peashy

Health up, +0.5 damage.

Philosopher’s Stone

Health up, grants three golden hearts.

Photon

Damage +1, then x1.5. Tears travel incredibly fast, colliding almost immediately.

Rapture

Decreases the size of enemy projectiles.

Reflux

Ceasing fire after a second will detonate all of the player’s on-screen projectiles.
Fire delay x2

Rewards Card

Partial refund. Purchasing an item from the shop will reduce the price of other items by one for the rest of the floor.

Rickets

+1 damage, high knock-back tears.
Firing also knocks you back.

Roll Film

“Half heart damage” is now taken at three hearts or below.

Passive Items (S-W)

Icon

Name

Effect

Salesman’s Eye

Shops have random discounts from 0 – 4 cents.

Spoils Pouch

Monsters have a chance to drop a temporary coin pickup on death.
Temporary coins do not proc “penny” trinkets.

Shycoin

+50 cents.

Silver Charm

Health up, transforms all current health into soul hearts.

Silver Flesh

Guaruntees that each floor is an alternate one.
Chance to fire a tear that deals x1.5 damage and grants half a soul heart if it kills.

Slick Spade

Chance to fire a suit of cards tear:

• Diamonds inflict midas freeze
• Hearts inflict charm
• Clubs inflict bleed
• Spades inflict fear

Using a playing card pocket item will inflict the corresponding effect on every monster in the room.

Sloth’s Toe

Speed -0.1.
Standing still for 3 seconds, grants +2 damage and fire delay x0.8.

Smooth Stone

Deal ×1.5 damage to bosses and monsters with high health.

Snake Oil

Damage up! (source: dude trust me)

Soap Box

Range up, restores two red hearts at the start of each floor.

Some Options

Pickups are occasionally accompanied by an extra item.
Taking one will cause the other to disappear.

Soy Bean

Chance to fire a tear that triggers a butter bean explosion on hit.
Monsters hit directly with a soy bean tear spawn a Linger Bean fart on death.

Sucker Sack

Spawn 1-3 blue flies for every half red heart healed.
Blue flies explode in a cloud of toxic gas.

Sunken Fly

Orbiting familiar that swells upon contact with an enemy, pushing them back greatly.

Suppository

Increases the amount gained from damage ups.
(Damage x1.5, then -2).

Technology Omicron

Tears gain a surrounding laser ring.

The Sign

Sets damage to 7 (before multipliers).

Tithe

Lose all held consumables at the start of each floor.
Gain an eternal heart if any items were lost. Gain +2% angel chance for each lost pickup.
Can provide access to angel rooms even after accepting a deal with the devil.

Tool

Chance to fire a tear that damages all enemies of the same type.

Toy Drum

Damage is briefly multiplied ×2 every few seconds.

Vanilla Wafer

For every full red heart of damage taken, half a heart is refunded on room clear.

Wax Wing

Grants flight and major stat upgrades until the player takes damage on that floor, teleporting them back to the starting room. (Damage x1.35, fire delay -2, speed +0.3, luck +2)
Wings and stats can be regained by picking up a Wax Feather, which can drop from the sacrifice room whilst in possession of this item.
Self dealt damage, including curse room doors, spiked chests, and blood donation machines, will not break the wings.

Weltling Sack

Explosion immunity. Bombs destroy enemy projectiles.

Trinkets

Icon

Name

Effect

Bookmark

Reduces the charge of all books.

Crutch

Increases the size of special tears.

(Special tears are defined by Crutch as any tears with tear flags different to the player’s tear flag attribute, for example: Scorpio poison won’t count, since every tear gets the effect, but Serpent’s Kiss poison will, as it is a chance per tear for the effect. Any Retribution custom tear flag-like effects, e.g. Cholera tears, will also count)

Goat Eye

10% chance for pickups to be doubled.

Grubby Penny

Coins produce blue spiders on pickup.

Guppy’s Eye

Increases the radius of revealed rooms.

Heart Worm

Range up.
Tears accelerate and decelerate in manner similar to Mom’s Heart.

Bindle

Beggars and slots pay out with items faster.

Open Mind

Additional collectibles (such as from more option-type effects) no longer disappear.

Pocket Bible

Halves the health of Mom and Mom’s Heart.

Popsicle Stick

Taking a negative pill will produce another, random pill.

Pyrite

Increases the chance of golden pickups dropping, including chests.

Rainbow Penny

Activates a random penny effect upon coin pickup.

Rose Thorns

Damages any monster that hurts the player.

Rusted Pipe

Transforms red poop into normal poop.

Silver Tongue

Reduces the price of shop items by one.

Spiro

Prevents the effects of puberty pills, instead granting +0.35 damage per puberty pill taken whilst holding.
Damage gained is lost on dropping the trinket.

Spoiled Coin

Monsters have a chance to drop a temporary “cursed” coin pickup on death.
These coins take longer to disappear than Spoils Pouch coins, but explode on vanishing.
If Spoils Pouch is held, cursed nickels and dimes may also drop.

Strength Badge

Boosts attack power by 1!

Thick Skin

Chance to take reduced damage.

Training Seat

Enemy creep clears up twice as fast while friendly creep remains longer.

Turnip

Mimics a Stalk Market pattern with your coins each room.
Rots after 7 rooms or upon being dropped. Regenerates on the next floor.

Console Commands

CiiruleanGiantbooks or CGB:
true/t: enables giantbooks (default).
false/f: disables giantbooks.
toggle: toggles between true and false.
query/q: states whether giantbooks will display currently.

Usage: CiiruleanGiantbooks true, cgb f, etc.

UnlockIcarusItems: unlocks all of Icarus’ unlockable items.
LockIcarusItems: locks all of Icarus’ unlockable items.

UnlockMammonItems: unlocks all of Mammon’s unlockable items.
LockMammonItems: locks all of Mammon’s unlockable items.

UnlockAllRetItems: unlocks all unlockable items from Retribution.
LockAllRetItems: locks all unlockable items from Retribution.

Case doesn’t matter for any command.

Compatibility Features

Retribution loads considerably late relative to other mods, and so it may be necessary to add your compatibility on MC_POST_GAME_STARTED, with some check to verify that the compatibility functions are not run multiple times. All instances of “Retribution” in the function names can be replaced with “CiiruleanItems” if you so wish.

Retribution natively supports the following mods:

• True Co-op
• Custom Stage API
• External Item Descriptions
• HUD API
• Modded Eden Start
• No Pickup Cap

If, as a developer, there is more compatibility features you would like me to add, feel free to comment it here or dm me on discord at Xalum#4103.

Icarus, Baptismal Shell, and Baptismal Font can upgrade and downgrade monsters respectively. Functions exist for you to add data to both of these transformation tables:

Retribution.AddIcarusEnemyData(type, variant, subtype, type2, variant2, subtype2)

• Type, Variant, and SubType are the data for the monster to be transformed
• Type2, Variant, and SubType2 are the data for the transforming monster to be transformed into
• SubType and SubType2 will default to 0 if left nil

Retribution.AddIcarusSpawnerBlacklist(type, variant, subtype)

• Type, Variant, and SubType are the data of the monster, from which, spawned monsters cannot transform (e.g. Mega Clotties, prevents the clotties it spawns from becoming more mega clotties)
• SubType will default to 0 if left blank

Retribution.AddBaptismalShellData(t, v, s, t2, v2, s2, activeonly)

• t, v, s, t2, v2, and s2, function identically to AddIcarusEnemyData
• If activeonly is true then the transformation cannot be caused by a Baptismal Shell tear, only through the Baptismal Font – This is used in Retribution for enemies that have too little health to survive after transformation through a single Baptismal Shell tear at base damage

Retribution.AddBook(base, mark, double, hold)

• Base: The original book’s ItemID
• Mark: The bookmarked book’s ItemID
• Double: The bookmarked book’s ItemID if you also have Schoolbag and Mom’s Box
• Hold: true/false, should the bookmarked books be held like a normal active item when its used

Each of the three books needs to be a separate item in order to facilitate the different maximum charge and sprite
This function automatically adds MC_USE_ITEM callbacks for the bookmarked books, these callbacks automatically use the base book item and hold up the bookmarked book

Lent grants a bonus if you do not pick up any hearts on a floor, if your mod adds new heart pickups it is important to let Lent know. Player entities have a data tag called lentcounter, increment this if a player picks up your heart

Retribution.RainbowPenny is a table of functions from which the effect of Rainbow Penny is drawn.

To add a new function:
Retribution.RainbowPenny[#Retribution.RainbowPenny + 1] = YourFunction

For example:

Some Options has a blacklist, so that some specialist pickups cannot spawn alongside a wooden counterpart. In Retribution this is used for Wooden Pickups themselves, Celestial Berries, and base-game specialist pickups, like Beds, Trophies, and Ending Chests.

To add a new banned spawner:
Retribution.AddSomeOptionsBannedDuplicator(variant)

• Variant: the variant of your pickup entity