Go on a mysterious adventure as a virgin ghost. Various stages that stimulate a sense of challenge are waiting for the virgin ghost Luna. If you want to feel the genre of 2D platformer in the 90s, try it!
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3 user reviews - Need more user reviews to generate a score
Release Date:
Nov 19, 2021

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Download UNDEMON (언데몬) Demo



About This Game

Hello, one-person development studio "WEST SUN".

I interested in horror contents. and virgin ghost is a familiar character in Korea.
I started developing that "How about making a virgin ghost the main character of the game?"
This game was developed by mixing the feelings of the 2D platform genre in the 90s.

I would appreciate it if you could enjoy the 2D platformer genre game where the cute virgin ghost is the main character.

Since it's a game made by oneself, there may be a bug.
I would appreciate it if you could report the fatal bug by e-mail.

Thank you.

* This game supports the following controllers.
xbox 360 pad / xbox one pad / play station 4 pad (dual shock 4)



One dark day...

A strong lightning strike a shabby tomb hard.

Due to the unknown cause, a ghost in the form of a woman appears in the tomb, but
virgin ghost suffer without remembering anything.

Someone found a virgin ghost in a house nearby,
The game begins as the virgin ghost notices it and enters the house.

Why did the main character become a ghost?
Let's go on a mysterious journey to find out who did it!


Game mode

- Normal mode: You can enjoy at a moderate difficulty.

- Original mode: This is the basic mode before the normal mode, and it is difficult in the early game due to the slippery controls, narrow field of view, and other ability factors.

- ???: It is unlocked once cleared regardless of the mode, and it is a level of difficulty that can be enjoyed in a unique situation that requires collecting souls to acquire 1UP.


Hide System

Luna, a virgin ghost, can hide slightly as a "hide".(not completely)
and It can stun state the other person for a while or pass through the body.

However, most people drink strange water, can see the existence of the ghost Luna.

Hiding is useless for animals.

Certain obstacles can be passed as 'hide' state.

Bump as 'hide' state at humans enemy.
The human enemy in stun state for a moment and the attack is valid.

Bosses have strong energy and cannot give them a state of stun, but they pass through the body as they are.
Instead, if you continue to attack, they can be stun state, so aim for that time.


Sight System

Luna hasn't been long since she became a ghost, so can only see humans her closely without lighting.
However, raising your ability widens the scope of seeing humans.
but, she can see animals regardless of sight range.



Collect souls, and raise your ability.

[Normal mode]

- Attack power is increased.

- The extent to which human enemies can be seen increases. (Including human bosses)

Flying time
- Flying time is increased.

Recover Flying
- The recovery time of flying ability is reduced.

Fire resistance
- Reduces damage caused by fire by 50%.

High jump
- Jump power increases.

[Original mode]

- The offense gradually increases, and the energy flies to the end.

- The extent to which human enemies can be seen increases. (Including human bosses)

- It becomes easier to control the movement of slippery ghosts.

Hiding time
- Hiding time increases.

Recover Hiding
- The recovery time for hiding ability is reduced.

Flight/Flying time
- Flying becomes possible, and flying time increases.

Recover Flying
- The recovery time of flying ability is reduced.


Stage progress

At the beginning of the stage, check the yellow key's image on the hint sign.

Find the key on the stage.
You can't throw away the key once you get it.
Yellow keys may have fake ones, so check them out in detail.
If the key you checked matches the key you found, obtain it.

The red key doesn't have a fake.
If you find it, get it right away.

Enter the next step using the right yellow key.
If a fake key is used, you will receive a penalty.

System Requirements

    • OS: Windows 7
    • Processor: Intel Core 2 Duo U7600
    • Memory: 2 GB RAM
    • Graphics: AMD Radeon HD 6250,NVIDIA GeForce GTX 1060 3GB
    • DirectX: Version 9.0
    • Storage: 1 GB available space
    • Sound Card: High Definition Audio
    • OS: Windows 10
    • Processor: Intel Core 2 Quad Q9000
    • Memory: 8 GB RAM
    • Graphics: AMD Radeon HD 6250,NVIDIA GeForce GTX 1060 3GB
    • DirectX: Version 11
    • Storage: 1 GB available space
    • Sound Card: NVIDIA High Definition Audio

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