.CK2 File Extension

A .CK2 file is a Crusader Kings II Saved Game, created by Paradox Interactive.

Open with Paradox Interactive Crusader Kings II+. Available for Linux, Windows, and Mac.

What is a .CK2 file?

A .CK2 file is a type of file used to save a player's game progress in Crusader Kings II, which is a strategy video game developed by Paradox Interactive. This file stores all the details about the player's game, including decisions made, characters developed, and territories conquered.

There are two types of .CK2 files. The first type is a plain text file. This means it is written in simple text that you can read and edit using any text editor, such as Notepad on Windows or TextEdit on Mac. Editing this file directly can change the game's progress when loaded in Crusader Kings II.

The second type of .CK2 file is compressed using Zip format to save space. To use this type of file, you first need to decompress it using a Zip decompression tool, like WinZip or 7-Zip. Once decompressed, it turns into a plain text file that can be opened in any text editor.

To open a .CK2 file, you can use the following programs: 1. Paradox Interactive's Crusader Kings II – This is the primary program for opening and using .CK2 files as it directly loads the saved game state. 2. Any text editor (for plain text versions) – Programs like Notepad or TextEdit can open the file if it's in plain text format, allowing you to view or modify the contents. 3. Any Zip decompression utility (for Zip-compressed versions) – Tools like WinZip, 7-Zip, or the built-in decompression software on your computer can be used to open and decompress .CK2 files that are saved in Zip format.

It's important to handle these files carefully, especially if editing manually, as improper changes can corrupt the file and make it unusable in the game.


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