The Binding of Isaac: Repentance - Delirium (No Damage, Hard Mode)

Hi. I'm Vtuber ZETA. I play video games, and I'm from Room 201.
Now let me tell you about Delirium.

Delirium is a buggy boss. He's bugged beyond belief. I want to like this boss, but I just can't. This fight is absolutely unbearable.
In this video, I fight Delirium where he can transform into every boss except Bumbino, Reap Creep, The Pile, Hush, Mega Satan, and The Matriarch. Bumbino, Reap Creep, and The Pile do not have Delirium forms, so they were omitted. Hush has no hurtbox for some reason. Mega Satan is just completely broken, doesn't work at all. And I'll be honest, I completely forgot about The Matriarch because I never see it when I play the game. After 25+ hours of trying to no-hit Delirium, I have a list of bugs and annoyances that I have encountered:
- Delirium teleports to a position at a certain distance from Isaac, which is relatively close to him. Sometimes, the tear patterns that Delirium creates make it nigh impossible to dodge when he teleports in a specific location. Also, if you're trying to go to a certain spot, Delirium can just teleport to exactly where you're going and you won't have enough time to react and turn around to avoid taking damage.
- Delirium's teleport affects certain bosses, such as sectioned bosses (Larry Jr., The Hollow, Pin, Scolex, The Frail) and Steven. If Delirium teleports across from you as any of these bosses, their sections will not be teleported with Delirium and will be pulled towards Delirium. There is a very high likelihood that you will take damage from the sections.
- Delirium can summon another boss. This would be okay if it weren't for the fact that the second boss can just spawn right on top of you, forcing you to take damage.
- When Delirium transforms into Mom, Daddy Long Legs, Triachnid, or Satan's second phase, the legs will hover directly above Isaac before stomping. During this brief moment, Delirium can shoot tears or transform into another boss, forcing you to take damage.
- When Delirium transforms into Monstro II or GISH, they frequently move way too fast, amplified even more when Delirium is aggressive. They only move at normal speed when they do the second jump off-screen.
- When Delirium transforms into Famine or War, if Delirium is aggressive, their charge attacks will move so fast that it's nearly impossible to dodge.
- When Delirium transforms into The Lamb's second phase, Delirium transforming into another boss will not make the body disappear.
- When Delirium transforms into Gemini or Steven, Delirium transforming into another boss afterward will not make Suture/Steven Baby disappear. They will chase Isaac.
- When Delirium transforms into Pin, Scolex, or The Frail, there is a chance that, when emerging from the ground, they will move extremely quickly across a very long distance with an unnatural elongated body.
- When Delirium transforms into The Bloat, there is a chance that The Bloat will do nothing until Delirium transforms into another boss.
- When Delirium transforms into Satan, there is a chance that he will be in Satan's leg-stomping phase. This is almost always broken as Satan's leg will hover above you and he will instantly transform into another boss, forcing you to take damage.
- The damage can be avoided if he transforms into a boss with a small hitbox or a boss without a hitbox at all (submerged Pin, Scolex, The Frail)
- When Delirium transforms into Blastocyst, there is a chance that there will be two of them. There is a very tiny chance that one of the Blastocysts will be invisible.
- When Delirium transforms into Chub, The Carrion Queen, or C.H.A.D., there is a chance that there will be two of them. One of them will be only a head and will not be able to do anything.
- When Delirium transforms into blue champion Larry Jr. or dark gray champion The Hollow, Delirium's health will drop significantly to near zero.
There are more bugs, but this is enough.

I want to like Delirium, but I can't. Not with these glaring bugs that the developers refuse to fix. So this attempt will have to do.
The only thing impressive about this no-hit is the amount of luck I had to not get a random bug to force me to take damage.


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