# The Great Unknown: Houdini's Castle

> Hidden object adventure game with puzzles and a mystery storyline. (iPhone/iPad app by JoyBits Ltd..)

- Source: https://appshunter.io/ios/app/the-great-unknown-houdinis-castle/id879439296 (this page in markdown: same URL + `.md`)
- Developer: [JoyBits Ltd.](https://appshunter.io/developer/375374774)
- Category: Games, Adventure, Puzzle
- Price: Free with in-app purchases
- Rating: 3.40/5 from 12 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 248 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, European Portuguese, Russian, European Spanish
- Released: 2015-08-11
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/the-great-unknown-houdinis-castle/id879439296/reviews.md

## What is The Great Unknown?

SOLVE THE MYSTERIES OF HOUDINI'S CASTLE

Beautiful Hidden Object Game Play Combined with Mysterious Adventure!
All Ages Game Play!

Your honeymoon is cut short when your plane crashes on an uncharted island. You awake to discover a madman has kidnapped your husband. To get him back, you'll have to use all your wits to pass his sinister tests and solve the mysteries of Houdini's Castle. Along the way, you'll uncover Houdini's secret past and learn about the brilliant apprentice who changed his life. Can you expose Houdini's greatest trick to save your husband and escape the island?

- Fantastic hidden objective & adventure game play
- 60 vivid and mystifying locations
- 2 search modes and over 300 hidden items to find
- Dozens of fascinating mini-games
- Rare videos and historical documents

## Key features

- Hidden object gameplay
- Mysterious adventure storyline
- 60 vivid locations
- Over 300 hidden items
- Dozens of mini-games
- Unlock historical documents

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full version | $2.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/the-great-unknown-houdinis-castle/id879439296/reviews.md

### 1/5 — Feels like a scam

*2025-07-09*

Bought the full game and have played through twice now and can’t get any further once I get to the basement. And iTunes won’t refund me for purchasing. I’m disappointed because the game is actually really fun. Don’t pay for the full game of you do try it!

### 1/5 — Pending payment

*2024-12-12*

I paid for game but it doesn’t open up and is pending on my apple purchases!

### 2/5 — Could have been fun, Kept crashing

*2017-03-30*

About an hour into game play a dialogue box froze and wouldn't close or allow me to continue. So I was forced to create a new profile and start over. About another hour of game play and the entire app crashed and closed. When I returned to the game, my 2nd profile was gone and my first was still locked on the popup. So, after 2 hours and 2 failed attempts, I deleted the game. It was fun to start with and I would have liked to continue playing. But didn't want to invest the energy for a 3rd attempt.

### 3/5 — Sammy girl

*2015-09-30*

Great game but how do I get more levels?

## Frequently asked questions about The Great Unknown

### What is Houdini's Castle about?

Houdini's Castle is a hidden object and adventure game where players solve puzzles to rescue a kidnapped husband from a mysterious island castle, uncovering Houdini's secrets along the way.

### Does Houdini's Castle have ads?

No, Houdini's Castle does not contain advertisements.

### What devices can I play Houdini's Castle on?

Houdini's Castle is available on iPhone and iPod devices.

### What is the age rating for Houdini's Castle?

Houdini's Castle has an age rating of 4+.

### How many locations are there in Houdini's Castle?

The game features 60 vivid and mystifying locations to explore.

### What kind of mini-games are in Houdini's Castle?

Houdini's Castle includes dozens of fascinating mini-games to complement the hidden object and adventure gameplay.

### What is the user rating for Houdini's Castle?

Houdini's Castle has a rating of 3.4 stars based on 12 user ratings.

### When was Houdini's Castle last updated?

The latest version of Houdini's Castle was released and last updated on August 11, 2015.

## Version history (last 1 release)

### 1.2 — 2015-08-11

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by JoyBits Ltd.

- [Doodle God™](https://appshunter.io/ios/app/doodle-god/id376374689)
- [Doodle Devil™ F2P](https://appshunter.io/ios/app/doodle-devil-f2p/id393867262)
- [Doodle Devil™](https://appshunter.io/ios/app/doodle-devil/id418925394)
- [Doodle God: Alchemy & Sandbox](https://appshunter.io/ios/app/doodle-god-alchemy-and-sandbox/id427157971)
- [Doodle Farm™](https://appshunter.io/ios/app/doodle-farm/id427804316)
- [Doodle Farm™ Lite](https://appshunter.io/ios/app/doodle-farm-lite/id453002174)

All apps by JoyBits Ltd.: https://appshunter.io/developer/375374774

## Related topics

[houdini](https://appshunter.io/ios/topics/houdini)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*