Undemon

Undemon is a 2D platformer in which you play as Luna, a ghost searching for the reason she died. After lightning strikes a shabby tomb, a woman-shaped ghost appears there with no memory. Someone finds her in a nearby house, and the journey begins when Luna notices and enters it.

Story

You guide Luna through challenging stages as she investigates who caused her to become a ghost. The game includes Normal mode, Original mode and a third mode that unlocks after completing the game on either difficulty. In that mode, you collect souls to earn 1UPs as you face its distinctive challenge.

Hide and sight

Luna can partially hide herself, stunning human enemies briefly when she bumps into them in this state, or passing through their bodies. Most humans have drunk strange water and can see her, while animals are unaffected by hiding. Luna can also pass through certain obstacles while hidden. Bosses are too powerful to be stunned this way, but repeated attacks can stun them temporarily.

Luna can initially see nearby humans without light, and improving her abilities extends her range. She can see animals regardless of her sight range.

Collect souls

You collect souls to improve Luna's abilities. The available upgrades depend on the mode:

• Normal mode: Increase attack power, extend the range for seeing human enemies and bosses, increase flying time, reduce flying recovery time, reduce fire damage by 50%, or increase jump power.
• Original mode: Gradually increase attack power and let its energy travel farther; extend the range for seeing human enemies and bosses; improve control over Luna's slippery movement; increase hiding time or reduce its recovery time; unlock flight and increase its duration; or reduce flying recovery time.

Find the keys

At the start of each stage, check the yellow key shown on the hint sign. Find keys on the stage and compare them with the sign: yellow keys can be fakes, and you cannot discard a key once you have picked it up. The red key has no fake, so take it when you find it. Use the matching yellow key to enter the next area; using a fake key brings a penalty.