Isaac (Boss)
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0 |

102.0


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This article is about the boss. For the character, see Isaac. |
Isaac is the boss of the Cathedral, and the final boss of Ending 13.
Contents
Behavior[edit | edit source]
Isaac lies on the ground in the middle of the room does not begin attacking until he takes damage.
During all three of Isaac's phases, he continuously shoots multiple projectiles in the player's direction at fixed intervals. After taking enough damage, he begins to shoot double projectiles and triple projectiles.
Phase 1[edit | edit source]
Isaac remains stationary on the ground and performs the following attacks:
- Shoots 10 lines of projectiles in every direction.
- Shoots 8 groups of projectiles in a that curve back towards him.
- Shoots 8 groups of long-range spinning projectiles along with 10 slightly curved lines of shorter-range projectiles in every direction.
Phase 2[edit | edit source]
Isaac stands up but remains stationary and performs the following attack:
- Isaac alternates between two projectile patterns:
- Shoots 4 projectiles in a cross pattern, which splits into four short-ranged projectiles after a short time, similar to
Cricket's Body.
- Shoots 8 projectiles in all directions.
- Shoots 4 projectiles in a cross pattern, which splits into four short-ranged projectiles after a short time, similar to
Independently of his projectile attack:
- Summons Angelic Babies in a pair.
Directly below him.
- Summons 2
Crack the Sky beams at random locations.
Phase 3[edit | edit source]
Isaac grows a pair of angelic wings and is no longer stationary, moving towards where the player is predicted to go with short dashes. During which he also performs the following attacks:
- Teleports off-screen and summons
Crack the Sky beams to cover the screen, starting from one of the top corners to the opposite bottom corner. After teleporting back on-screen, he shoots the 10 lines of projectiles from the first phase. He always performs this attack at the start of this phase and repeats this process every time he takes a certain amount of damage.
Shadows indicate ahead of time where the beams strike.
- Can perform all projectile patterns from the first phase.
Gallery[edit | edit source]
Isaac as one of Delirium's forms.
Unlockable Achievements[edit | edit source]
- The Polaroid - Defeat Isaac 5 times.
BRAINS! - Defeat Isaac 5 times.
PONG - Defeat Isaac 5 times.
- Something Icky - Defeat Isaac 10 times.
- Isaac's Tears - Defeat Isaac as
Isaac.
- A Bag of Pennies - Defeat Isaac as
Cain.
- Guillotine - Defeat Isaac as
Judas.
- Eve's Bird Foot - Defeat Isaac as
Eve.
- Bloody Lust - Defeat Isaac as
Samson.
- Satanic Bible - Defeat Isaac as
Azazel.
- Lazarus' Rags - Defeat Isaac as
Lazarus.
- Blank Card - Defeat Isaac as
Eden.
- Isaac's Heart - Defeat Isaac as
The Lost.
- Godhead - Earn all
5 /
9 (except the cent sign for Ultra Greed) /
10 /
12 completion marks on Hard mode as
The Lost.
Notes[edit | edit source]
- Every time Isaac is defeated, the current savefile's image changes until
The Polaroid is unlocked.
Trivia[edit | edit source]
- Isaac was added in the Wrath of the Lamb DLC for the original The Binding of Isaac.
- Isaac, along with ???, teleport away upon defeat and do not "die".
- Isaac's expression as he changes phases during the fight goes from a somber, scared tone to him smiling in his third phase. This supports the theory that Isaac has made peace with himself and realized what he must do, as seen through the multiple endings of the game.
- The music that plays during this boss fight is titled Infanticide.[1] The term infanticide refers to the act of killing an infant or newborn.
- In the original Wrath of the Lamb DLC, the song is was My Innermost Apocalypse.
- During his first phase, Isaac makes the same crying sound as Mulligans. This also applies to ???.
Bugs[edit | edit source]
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References[edit | edit source]
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