These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Big Lipped Alligator Moment: The "Toy Hunter: Cork Goes to Hell" level, which recasts you as an action figure named Cork who returns home just in time to watch his owner die. His Fanservice-y girlfriend, Sexy Doll, is placed in the coffin along with the boy and ends up in Toy Hell. Despondent, Cork becomes a milkoholic, shoots up a bar full of singing eggs, goes to prison, is sentenced to execution, escapes prison through the Absurdly-Spacious Sewer, finds a new owner, kills him, is placed in the coffin, ends up in Toy Hell, fights a Satanic (and animatronic) Sonic the Hedgehog, is nearly forced to fight said evil hedgehog forever due to a programming glitch, and escapes on a rocket. It's an entire subplot made up ofBLAMs, none of which have anything to do with Illbleed's story.
Lesser example: what the crap does the Cake From Hell have to do with anything?
Even in one of the videos made to hype up the game, it cuts to him saying his name for no discernable reason and moves on without any reference to it again.
Ensemble Dark Horse: Dummyman, a recurring enemy that appears in certain spots of the game. He appears to be one in universe as well, as movie posters advertising Dummyman movies are all over the place, and he even has a photo shop!
Killerman to a lesser extent. The manual states that he has a movie series as well.
Don't forget OHNOMAN, the most popular of the three final bosses. Mostly due to his name.
Fridge Logic: In the bad ending, why doesn't Eriko use her vast riches to revive her dead friends at the Illbleed hospital? It's like she forgot it was there! Might be a case of Gameplay and Story Segregation though.
Fridge Brilliance: Actually, she does exactly that. This is why Kevin is her new boyfriend in the true ending. She took the money, saved her friends and decided to never go near anything scary ever again.
Good Bad Bugs: Opening your map causes the enemies to freeze for a few seconds when you close it. Vital for avoiding tougher battles (like when you're a Woodpuppet).
Harsher in Hindsight: In this game, one of the ways to die is shock death, where your heart pulse rises, and if it rises too high, you die. The creator of the game, Shinya Nishigaki, died of a heart attack years later..
Toy Hunter during which you end up in a Toy Story clone in which Woody becomes an alcoholic, murders innocent people, then tries to die so he can go to hell and be reunited with his girlfriend. It also involves a talking rocket ship, a haunted town, and singing eggs.
Eriko's Dad and The True Final Boss who melts into a puddle with his naked daughter wading trough it as she fights his giant, eyeless melted head that shoots rainbow beams. Then the head splits open and reveals a flying brain tentacle monster. Woo!
Hell, the entire game. Every level has something WTF-worthy in it.