Important Notice

As of 13:00 on March 24th, 2021 (JST), you will no longer be able ton purchase games/content/etc. on the PLAYISM Store.Additionally, the My Page feature, from which you can redownload purchased games/content and reacquire Steam keys, are scheduled to also cease function after 13:00 on May 10th, 2021 (JST).Please be sure to properly make any necessary purchases and save any purchased content/post-purchase data/etc. as required before the above-listed dates.Please see here for details.
Download Free Demo

Helen knows little about who she is...

A young girl with a hidden past goes on a journey in hopes of learning more about her past in this RPG adventure.

DRM-Free and Steam Key

All users that purchase this title on Playism will receive both a DRM-free copy and a Steam key!


Helen's Mysterious Castle's demo version is only available in Japanese.

Helen knows little about who she is and where she is, but she's dying to find out. Stuck on a floating island with a maze-like castle begging to be explored, Helen lets her curiosity get the better of her. It's a good thing she's more than capable.

Armed with a plethora of weapons she finds on her journey, Helen must battle monsters, collect new equipment, and uncover the secrets of her mysterious home.


Helen spends the game fighting on her own, and she wouldn't have it any other way. Using the unique 1-on-1 combat system, Helen can collect weapons, and switch between them during battle as the situation dictates. 

Using the passage of time and a knowledge of your opponents, you can quickly bring out the right weapon for the job and finish off foes before they have a chance to react.

Upgrade weapons using experience points gathered from defeated enemies, collect new weapons hidden within the labyrinth, and build the perfect arsenal.

Equip and upgrade weapons of all shapes and sizes, from bows and shields to broadswords and devastating magic spells. Learning when to use each weapon is the ultimate key to victory.

SwordWith the ability to both attack foes and mitigate damage while drawn, swords are a versatile weapon for battles.
BowBows are fast and lethal weapons, though they cannot defend you in battle.
MagicMagic spells come in all shapes and sizes, and deliver devastating damage to foes, but only after a considerable casting time.
Primarily for defense, shields can protect you from a particularly damaging attack when timed correctly.
A plethora of support items exist that can help you in a variety of ways in battle. While they don't directly damage foes, they might still save your life in a pinch.
  • The Cast



Our heroine. A girl of few words.



A man that lives with Helen.


The Demon King

Ruler of the Four Lords.


Undead Knight

He seems to appear wherever Helen goes.



A hero.


The Fairy

The hero's attendant.

  • Death Isn't The End

Death can come swiftly in the world of Helen's Mysterious Castle, but it's not the end of the adventure. Every time Helen perishes, she'll reawaken in the cabin with a piping hot salisbury steak ready to eat. Gobbling up this delicious meal will grant her a permanent increase to her life, making otherwise difficult foes just a little easier.

This indie game was designed to make you think, just a little bit. Players have to figure out the answers for themselves, but the game isn’t meant to be overly complex. Anyone who’s tired of either games that are simply too complicated or conversely having their hand being held throughout the game might have something to take away from this title. Because this indie game was originally made so most people could play through it without too much trouble, I’ve added a trickier bonus dungeon for those playing the English version, who I assume will be more ‘core’ in what they’re looking for. And if that isn’t enough, there’s one more interesting surprise waiting for you... 

This game is made so that pretty much anyone can play through it, but I’ve added a trickier bonus dungeon for those playing the English version, whom I assume will be more core players. And if even that isn’t enough for you, there’s one more interesting surprise...

SatsuDeveloper'S Voice

This game is made by RPG Maker, so the engine's exclusive feature is available as shown below.

If you want to take a screenshot using Steam Overlay feature, please change the key to the key other than F12.

  • F12: Reset the game
  • Alt+Enter: Full screen / Window mode

Text is Unreadable

A small text bug sometimes occurs on Windows machines when starting up the game, making the in-game text harder to read. To fix this bug, please follow the instructions below:

NOTE: These instructions are designed for Windows 7. Menu options might vary in other versions of Windows.

  1. Go to your Control Panel
  2. Open the Region and Language menu item.
  3. Click on the Administrative tab
  4. Under "Language for non-Unicode programs", click the "Change system locale..." button.
  5. Click on the drop down menu and select"Japanese"
  6. When the pop-up appears, click "Restart Now" to accept the changes.

If you are having some troubles with this title, please do not hesitate to check out our Help pages or contact us about it! 

  • Windows

    • Operating SystemWindows 2000 / XP / Vista / 7 / 8



Satsu is an independent developer that works mainly in RPG Maker.