Ultra Greed is the final boss of Greed Mode and Ending 18.
Behavior[ | ]
Ultra Greed is fought in a unique vertical double-size room with golden Boss Room doors on all 4 walls in regular positions. When Isaac enters the boss room, Ultra Greed starts out hanging on a noose before he abruptly cuts it off and lands on the ground. Ultra Greed cannot be damaged until he drops to the ground. Ultra Greed then performs a variety of attacks in addition to wandering around the room:
- Stomps on the ground 4 times, spawning a
Keeper with each stomp. Only 4 Keepers can be alive at once. - Charges at Isaac when he is in line of sight.
- Shoots either 3-5 coin projectiles in a spread from his mouth, or a cluster of coin projectiles, similar to Monstro.
- Ultra Greed does not perform this attack if Isaac is far enough away.
- Spins around the room, firing coin projectiles in random directions.
- If Isaac is too close to Ultra Greed, he performs a spin, kicking Isaac away in the process.
- Stops moving and rotates his eyes in a slot machine manner. If both eyes land on the same symbol, he then spawns multiple Ultra Greed Coins of the same symbol.
- If the two symbols on Ultra Greed's eyes don't match, he spawns blank Ultra Greed Coins (Spinner).
| Entity | ID | Description |
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Ultra Greed Coin (Spinner) |
293.0 | Spins around the room, dealing contact damage. |
Ultra Greed Coin (Key) |
293.1 | Spins on itself and opens a golden door around the room if not destroyed, spawning hordes of Greed Gapers. |
Ultra Greed Coin (Bomb) |
293.2 | Spins on itself and explodes with a large radius if not destroyed. |
Ultra Greed Coin (Heart) |
293.3 | Spins on itself and heals Ultra Greed for 13.125 HP each if not destroyed. |
- If there are too many monsters/coins alive at once, Ultra Greed assumes a defensive stance. While blocking, Ultra Greed takes much less damage from Isaac's attacks, and maintains this state until most of the monsters/coins have been killed.
All of Ultra Greed's attacks deal a full heart of damage and cause Isaac to drop coins on hit. If he walks over any coins on the ground, he collects them, healing him for 4.375 HP each. Doing so also makes him slightly more aggressive. Heart coins also make the boss angrier.
When Ultra Greed has low health, he turns red, which increases his attack speed and movement speed. This effect also occurs if Ultra Greed is healed by enough Heart Ultra Greed Coins, although only providing a temporary effect.
- The scaling speed increases if Everything is Terrible 2!!! has been unlocked by using the Greed Donation Machine.
When Ultra Greed's health bar is depleted, he turns into a golden statue and drops the end chest and the 
Greed Donation Machine. If in Greedier Mode, he instead begins his second phase.
Ultra Greedier[ | ]
Greedier Mode is a mode added in Afterbirth ♰. It is unlocked by depositing 500 coins in the Greed Machine.
Playing on Greedier Mode gives Ultra Greed a second phase where his gold statue form comes to life. This phase is known as Ultra Greedier, and is the final boss of Ending 19. Additionally, he performs several new attacks:
- The coin projectiles that Ultra Greedier shoots from his first phase now explode upon contact.
- Slams his fists into the ground, creating explosions where he slams and causing golden Brimstone lasers to fire from the golden Boss Room doors that surround the room.
- They can either come out from one pair of doors at a time or from all of them at once.
- Jumps into the air towards Isaac's position, dropping exploding coins down below while travelling. Upon landing, rock waves are sent in various directions.
- Stomps on the ground four times, causing a slew of Bomb Coins to rain from the ceiling.
- These coins can spawn coin pickups when they explode, providing both healing for Ultra Greedier and extra coins for Isaac.
After defeating Ultra Greedier, he explodes, dropping a coin pickup and turning the entire room into solid gold. It is at this point that the end chest and the Greed Donation Machine spawn.
Gallery[ | ]
Ultra Greed in-game.
Ultra Greed hanging from the ceiling.
Golden statue form of Ultra Greed.
Ultra Greedier in-game.
Beta Ultra Greed's appearance/spritesheets
More beta images of Ultra Greed.
The Ultra Greed mode unlock in Korean. Notably, Ultra Greed has a beard.
Unlockable Achievements[ | ]
Greed Mode[ | ]
- Lil' Chest - Defeat Ultra Greed asIsaac.
- Cracked Dice - Defeat Ultra Greed as???.
- Black Feather - Defeat Ultra Greed asEve.
- Lusty Blood - Defeat Ultra Greed asSamson.
- Box of Friends - Defeat Ultra Greed asLilith.
- Rib of Greed - Defeat Ultra Greed asKeeper.
Greedier Mode[ | ]
Completing Greedier Mode with a character will unlock the corresponding Greed Mode unlockable if it hasn't been unlocked.
Damage Scaling[ | ]
Damage scaling is a mechanic introduced in The Binding of Isaac: Afterbirth to provide a more challenging experience to the players, enabling some enemies to retaliate against high damage attacks by deploying an "armor" of sort to greatly reduce the amount of damage taken. Further details and an in-depth explanation may be found here.
Notes[ | ]
- Using Gnawed Leaf and any damage-dealing orbital, stand in front of Ultra Greed when he is charging. Ultra Greed attempts to charge into the wall but will get stuck on Isaac. Waiting in this position will eventually kill him.
- After Key Coins appear, using A Card Against Humanity causes spawned Gapers to be stuck and, as long as they're alive, Ultra Greed will not attack.
- Having E. Coli (and perhaps other contact-based collectibles) is a fast way of disabling the Bomb, Key, or Heart Coins because they don't do contact damage. However, unmarked coins do.
- Midas' Touch negates Ultra Greed's damage scaling.
- Except for direct contact and the Brimstone lasers, all of Ultra Greedier's attacks only do explosive damage. Therefore having Pyromaniac or Host Hat makes this phase of the fight much easier to survive.
- The rock waves after Ultra Greedier's jump attack are no longer considered explosive damage.
- If you manage to spawn a Sticky Nickel (possibly through a D20) Ultra Greed may station himself over it and no longer move around the arena.
- Eraser can allow the Ultra Greedier phase to be skipped if you use it on Ultra Greed when he has 15 or less HP.
Except for direct contact and the 
Trivia[ | ]
- If Isaac enters the trapdoor created by a Rune of Ehwaz on this floor, it starts over.
- Ultra Greed can pick up coins even after being turned into a statue.
- Ultra Greed is the second Ultra deadly sin boss to appear in the game, behind Ultra Pride, but is the first to appear as a final boss.
- Teleporting out of the boss room after defeating Ultra Greed will cause the statue to disappear.
- The name "Ultra Greedier" comes from the bestiary.
- In Greedier Mode, when Ultra Greed is defeated for the first time, he will stay as a gold statue for 10 seconds before he begins to break out and turn into Ultra Greedier. On future runs, he will begin to break out immediately instead.
- If Ultra Greedier is spawned with the Debug Console into any room besides his normal room or Shops, the entire room will still be turned to gold when he dies. This is due to a special shader that turns on in the room when he dies, so using effects like A Card Against Humanity or XVI - The Tower? will make the grid entities spawned look golden.
- Any poop spawned in the Ultra Greedier fight, destroyed or not, will respawn as Golden Poop when Ultra Greedier dies and turns the room into gold.
- This effect is only visual, they act like regular Poop when destroyed despite the gold color.
- Prior to Booster Pack #5, Ultra Greed could spawn Blisters along with Keepers.
- There is an unused form of Ultra Greed in the game's sprite sheets, with a goatee style beard and a less fit body build. He was supposed to be a boss that represented Tyrone Rodriguez,[1] similar to how Ultra Pride represents Edmund McMillen and Florian Himsl. This spritesheet can be found in the file folder "delirium forms".
- The Korean version of the game still has some images with the beard used in the game.
- According to Edmund in a twitter AMA, the other deadly sins were supposed to have ultra forms as well, but were scrapped for unknown reasons.
- The prevalence of greed and money as a theme could represent how Isaac's Dad's poor spending habits, as heard in the dialogue of the Ascent, have affected Isaac.
Bugs[ | ]
 Bug!
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If Ultra Greed is defeated at the bottom of the room, the ending chest will spawn incorrectly, causing it to be unreachable. |
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| Bug!
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If Ultra Greed is hit by a  Chaos Card after being turned into gold, his death animation will replay and cause a lot of gut splatter.
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| Bug!
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If the player dies and respawns outside of the room while Ultra Greed is rolling his eyes like a slot machine, the slot machine sound will play continuously until the game is paused. |
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| Bug!
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 Ultra Greed can 1-shot the player if they have Metal Plate,  Cone Head, or other possible items.[2]
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| Bug!
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If the player manages to constantly push back Ultra Greed while he charges so that he won't touch one of the walls, he will become stuck in his charge animation and won't do anything else until defeated. This can be easily done with   Ocular Rift or  Knockout Drops and a high amount of luck or tears.
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References[ | ]
 Ultra Greed Unlocks
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 Ultra Greedier Unlocks
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 Greed Donation Machine Unlocks
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 The Binding of Isaac: Rebirth
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