There are a number of ways to reach the credits in The Binding of Isaac: Repentance, but there is only one path that leads to the true ending. That path is filled with several difficult battles and numerous mysteries to solve, and indeed players may find themselves lost at various points. It is with that in mind that this guide is being written, and fans that read on should be able to reach the final boss and see the true ending in The Binding of Isaac: Repentance.
The first step to getting the true ending in this new DLC is to collect Knife Piece 1 and 2 in order to assemble the Knife. For the uninitiated the first Knife Piece in The Binding of Isaac: Repentance is obtained by walking into a blue-grey flame on Downpour/Dross 2, turning into the Lost, and entering the mirror on the floor. The second Knife Piece, on the other hand, is accessed by pressing all of the yellow buttons in Mines/Ashpit 2 and riding the nearby minecart.
Updated November 24th, 2021 by Russ Boswell: Players looking to see all there is to see concerning The Binding of Isaac will need to go through an array of steps and seek out the true ending to the tumultuous tale. Roguelike fans will have a hard time collecting the necessary resources to make it all the way to "Home" and the final bosses that wait. To better help players discover how to fight Dogma in The Binding of Isaac: Repentance, the following guide has been updated. It now includes information on how to fight Dogma as Isaac and how to fight against the slew of bosses afterward.
How To Get The True Ending In The Binding of Isaac: Repentance
With the Knife in hand, players must now reach the red door in The Binding of Isaac: Repentance, which appears at the end Mausoleum/Gehenna 2. Hitting that door with the Knife will cause it to open, and fans will face another boss battle on the other side. After defeating this foe, players should exit the room, fall into the hole to enter the Corpse floor, and clear all the way to the end to reach the credits.
At this point, fans will receive indication that a Strange Door has appeared in the Depths, and the next step is to pass through it. To enter the Strange Door in The Binding of Isaac: Repentance, players will need to use The Polaroid or The Negative that comes from defeating Mom. Notably, fans will need The Fool card to be able to teleport when they have picked up The Polaroid or The Negative, and one can be found by blowing up the marked skull that always appears in Depths 2.
Once a player has gotten through the Strange Door, they should fall into the hole that they encounter to be transported to Mausoleum 2. Roguelike fans should now work their way through the floor until they reach its boss room, and they should grab the item that they find there. This will once again cause the character teleport, and players must now work their way through all of the floors that they cleared previously until they reach a beam of light on Basement 1.
Fans should how enter this light in order to reach the DLC's final floor, which is called Home. Here players will find a number of rooms and hallways, and they should make their way to Mom's bedroom and look at her bed to gain access to an alternative version of the floor. They should now head to the room with the television and stare at the device to trigger a battle with Dogma. Defeating this boss in The Binding of Isaac will segue directly into the final boss fight, and players that come out victorious will receive the true ending.
Warning: The section below contains spoilers.
Facing The Final Bosses Of The Binding Of Isaac
Players that manage to make it to Dogma will be greeted by a "singular boss fight" that spans through a total of six enemies, starting with the static-infused boss itself.
Dogma (Base HP: 2400)
Dogma is fairly easy to deal with for those that can learn its attack patterns. Its first form forces players to attack a television to do damage, which Dogma itself is tethered to. Shooting the boss will not cause damage in this phase and will instead proc a small shield. The main attacks to watch out for at this point are static projectiles and a large static beam that Dogma can quickly change directions with. Players should keep moving to make sure the boss has a harder time hitting them.
Once Dogma's television is broken, players will have to contend with a morphed version of the boss itself, which will fly around the arena and attempt to strike players with an array of feathers that fan out and slowly move through the air. It will also occasionally surround itself with thin beams of light that "activate" after a few seconds and will damage Isaac if he is standing in them during activation. In this phase, players should move to avoid feathers and then make sure they are standing between the beams of light before they activate. All in all, Dogma isn't a very difficult foe if players can learn its attacks quickly.
The Ultra Harbingers (Base HP - Famine: 2000, Pestilence: 1800, War: 2000, Death: 2000)
Once players manage to defeat Dogma, they will be transported into a 2D side-scrolling Hellscape where they must fight against four Ultra Habingers. These classic foes are much larger and have much harder-hitting attacks in these variants. They act much like their original counterparts but it can be difficult to maneuver around their attacks in this new "side-scrolling space."
Players will need to defeat all four of the Ultra Harbingers to trigger the fight with the final boss of The Binding of Isaac, The Beast.
The Beast (Base HP - 10,000)
Although imposing, the Beast isn't exactly capable of harming Isaac with an array of powerful projectile attacks. When it first emerges, the arena will slightly change and the screen will start scrolling to the left as the Beast begins to chase Isaac down. Players will need to continuously attack the Beast while avoiding a series of rocks that hang up and down in points. Once the Beast takes enough damage, it will disappear under the lava and re-emerge on the left side, chasing Isaac to the right this time at a faster pace. Players simply need to keep an eye on their surroundings, avoiding rocks and continuously dishing out damage to win this fight.
The Binding of Isaac is available on PC, Nintendo Switch, PlayStation 4, and Xbox One.
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