Joker is Shiki for beta males.

You kill things.

Boo's Mansion/Tohno Mansion

Also Mario can die.

Blue Moon is a song in the game and the game starts on a shot of the moon.
You also can die and also kill things with one strike, and you can wield knives.

You slice people to instantly kill them.

Consumption of hallucinogens

Zombies

Protagonist has black hair and wears glasses, he also uses a knife.

Horror Vibes and Cute Girls, also death.

Gwyndolin is literally Arcueid.

Kingdom Hearts is just a big moon in the sky.

Vampires

The narrator's of both are insane

The protagonist gets possessed by an evil entity that reincarnates.

There's a DLC with Vampires, and you can recreate the cast of Tsukihime in it if you wanted to.

It has the moon in it.

Zero is the progenitor of the Maverick Virus and gives it to Sigma who reincarnates himself while also infecting others, Zero is also a robot who wears White and Red and has Blonde Hair while X the main protagonist primarily wears Blue.

Vergil wears blue and cuts things, Dante has shoulder length hair and wears red, also the moon is on the cover.

Sonic is blue and can kill things in one hit, Knuckles is Red and from an ancient tribe. Sonic is Shiki, Knuckles is Arcueid, I am drunk.

There are undead creatures.

Pac-Man starts the game shaped like a moon, and can die, which is just like Tsukihime.

Ken is Blonde and wears Red.

Time Vampires.

You are a vampire

There's a vampire and you kill a being called Chaos

Misogyny

Both have music

You have sexual intercourse with women

They both have music.

Some levels take place at night.

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Kohaku is like the funny devil man Hazama. Here's artwork by ILoveKohaku97 which shows her dressed as Hazama it's based.

DIO is a vampire who has blonde hair, and wears red, there's also night time stages.

You have intercourse with women

Originator

These are both technically indie projects, the sole difference being that Yandere Simulator is irredeemably shit.

One of the guest characters is from Melty Blood.

It's a visual novel

My friend is extremely mixed on both of these but I'm just gonna say it's because you play a guy who cuts people and is descended from killers or some shit.

Weeb shit that defined a generation

Project Moon, Type Moon, they have Moons and are also visual novel makers.

You can program Melty Blood characters into the game.

There are night missions.

Moon is in the fucking title.

Japan

Weird shit happens

Both games have blood in them.

Both have music

Both have underaged characters engaging in dangerous activity.

Scary

There's powers higher than mankind.

Also it's a visual novel.

Sexual Content

Sexual Content

There's a lot of bad endings, also both games are visual novels.

Moon is in the title of both

There is a stage that starts you on the moon.