B3313 Iceberg (based on The Luigi's iceberg video)
A transcription of the B3313 iceberg video made by The Luigi on Youtube. All of the entries are present, though I added a few entries that I feel deserved to be included.
Also, it'll be very wordy, so grab a snack and a drink before you dive in.
Thumbnail art by zhjake on Tumblr.
Mechanics
Areas
Horror stuff
Secrets
General
Outside the game
Plot / Themes / Symbolism
Theories
Unexplained Stuff

The Castle Grounds
Every Copy of B3313 is Personalized
The A.I.
Maze-Like Design
B3313 Takes Inspiration from various Sources
Negative Lives Glitch
The Plexus
Changing HUD
Real Beta Levels Used
Fake Stars
Liminal Spaces
Plexal Lobby
Areas from Other Mario Games
B3313’s connection with dreams
Incomplete Areas
Mutant ToadsRefSBI
Floor 2BRef
The Plot
Toad Statues
Unsettling Texts
The CoreRef
lobby.z64Ref
B3313 Endings
The Prevalence of Caps
“SHHH! PLEASE WALK QUIETLY IN THE HALLWAY!”
Internal Sewer System
The Significance of Wet-Dry World
Yoshi’s Odd Behavior
Faceless Toads were created by The A.I.
The Frequency of Boos
Absence of 1-UPs
The Missing Apparition
Crawly CaveRef
His DomainRef
Star Road
Polygonal Chaos is the A.I.’s first creation
The significance of Mr. Is
The Koopa SocietyRef
The Snowman’s smile
The Mr. I trapRefSBI
The Corrupted areas
Mario doesn’t care
The Star Toad is the A.I.’s attempt at making a normal Toad
B3313 happens because the A.I. was never put to rest
Bowser’s Plexus Takeover
The use of scale
Scrapped Ending
The Bob-Omb War
The Bowser Theory
Endings
Nobody’s Playthrough is the same
Peach Painting Negative Aura
There are 2 separates A.I.
B3313’s Endless Negative Aura
Areas you will never find again
Paintings aren’t safe
The Floating Bullet Bill
The Shadow’s IntentionsSBI
What happened to Peach ?
The A.I. cannot be put down for good