Minigames are found in rooms containing four arcade machines.
As of now, there are only three playable minigames. The last arcade machine displays a cinematic if the player inputs the right password.
Mall of the Spook
In Mall of The Spook, the player controls Spooky, moving her up and down in a long hallway while stabbing people with her knife to fill a constantly draining health bar. The health bar will drain faster as the player progresses, and the speed of the game increases. When the heath bar runs out, the player will be presented with the "GAME OVER" screen.
The controls are simple - press 'Enter/Space/E' to stab, and either 'WASD' or the arrow keys to move.
Also notable is the fact that while Spooky appears to slit the throats of female NPCs, the heads of any male NPCs seem to explode.
Mrs. Spook is a Pac-Man-esque game where the player controls Spooky and must catch a character resembling Pac-Man.
The player controls her movement with 'WASD' or the arrow keys.
When Spooky (the player) touches Pac-Man, a large nail flies from offscreen, impaling Pac-Man while a death rattle loops in the background. Allowing Pac-Man to eat the pellets does nothing.
Spooky Kart is a 3D racing game in which the player, presumed to be Spooky, must catch up to other racers and crash their cars to earn time bonuses. The game ends when the timer runs out.
The player's car is a Marauder military truck while the other cars are all Reliant Robins. Upon crashing into another car and having it explode the announcer will say one of four things: "Nitrous!", "Checkpoint!", "Killer!", and "Crime doesn't pay!".
To accelerate, press the 'W' or the 'Up' arrow key. To steer the wheel, press the 'A' and 'D' keys or the 'Left' and 'Right' keys. To brake, simply press the 'S' or the 'Down' arrow key.
Secret Arcade Machine
During the exploration of the mansion, a particular room gives the protagonist the password for the last machine. If the right password is used, the last arcade machine displays a cinematic about what seems to be Spooky's past and ultimate motivation. The Secret Arcade Machine code is 1235, it only happens in rooms 900-1000.
It appears to be a clip of Spooky's story, showing her alive, until she tried to scare someone who overreacted to the prank and shot her. At the end of the video, A message will popup saying: I just wanted to be taken seriously. I just wanted to scare people. They overreacted, but I don't blame them. At least I finally scared someone.
In Karamari Hospital DLC a note (See note eight) reveals that the person she tried to scare was a PTSD sufferer and that the costume she was wearing was the Red Death from the tale The Masque of the Red Death from Edgar Allan Poe.
As of the July 4, 2016 update; the minigame Sunshine Academy can be found in one of the rooms on the lowest floor of Karamari Hospital. The game is played on a handheld called the 'Honey Boy'.
It is a dating sim/visual novel where the player interacts with a character named Ume Ito. However, the main goal is to 'Fail' the game by getting transferred from the school. Otherwise, they will stalk Ume down her street and kill her, usually on the 3rd day. By the fourth day she begins talking back to the player, and they must restart the game to attempt it again.
There is a small chance upon starting a minigame that a random Specimen's chase theme and sounds can be heard as if it is very close to the player. However, they will not actually die and when exiting the minigame, the music and sounds stop. It is unknown if this only happens on certain floors. 
In Spooky Kart, it is possible to clip through the fences and buildings.
In HDR Spooky Kart, if you get hit by a car when it explodes you will be thrown Into the air and you will start to fly
- At the high scores screen, any name typed in will instantly turn into Spooky, implying that Spooky is very egotistical.
- Before Room 500, the Spooky Kart game is not available.
- The name 'Spooky Kart' is a reference to the 'Mario Kart' franchise.
- All of the games make it even clearer that Spooky is villainous, or grotesque and psychopathic
- However, the last arcade machine shows the origin of Spooky, when she was still alive, the 12 years old girl in a Halloween costume and this proves that she was not originally evil.
- Sunshine Academy makes several references to the horror manga author Junji Ito. The main character is named Ume Ito and talks about classes on Spirals referencing Uzumaki, and germs causing gas pressure referencing Gyo.