Opening a YKEY File

The YKEY file type is primarily associated with Castles & Catapults.

YKEY	File extension: YKEY
	File type:	Game File

What is a YKEY file?

YKEY files mostly belong to Castles & Catapults by Infogrames Entertainment SA. Castles & Catapults combines the turn-based planning and strategy of a board game with the action of a real-time computer game. Clicking on the official game site redirects you to the Atari site. Infogrames owns the majority of shares in Atari.

How can I open a YKEY file?

You need a suitable software like Castles & Catapults to open a YKEY file. You need a suitable software like Castles & Catapults from Infogrames Entertainment SA to open a YKEY file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your YKEY file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a YKEY file directly in the browser:. Just drag the file onto this browser window and drop it.

Online YKEY Text Viewer

Choose your .ykey file to analyze

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Online File Viewer

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What to Do When a .YKEY File Fails to Open

Because .YKEY files come from various programs, they aren't universally openable.

Identify the Source: A retro gaming archive suggests the classic game Castles & Catapults. A developer source may imply a custom license key.
Check the Header: Inspect the first bytes using a text editor or hex viewer:
- Readable XML/JSON suggests a configuration file.
- Unreadable binary data indicates a proprietary game asset.
Use the Original Software: The original program is usually required; try Infogrames' Castles & Catapults, or ask the sender if uncertain.
Use this Webpage: Drag and drop your .YKEY file here to detect its format, extract readable text, and preview the contents.

Technical Data for YKEY File Extension

File classification:

Game

Related files:

yar, yap, ymy

a ykey Game File is a special file format by Infogrames Entertainment SA and should only be edited and saved with the appropriate software.

How to solve problems with YKEY files

Associate the YKEY file extension with the correct application.
Update your software that should actually open game files. Because only the current version supports the latest YKEY file format. Search, therefore, e.g. on the Infogrames Entertainment SA manufacturer website after an available Castles & Catapults update.
To make sure that your YKEY file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .YKEY file online - secure, fast, and no downloads needed.