CPK

CPK is an archive format developed by CRI Middleware. It is used in games for a variety of platforms. Files of this format have a .cpk extension.

The first four bytes of the file always have the value 0x43504B20 ("CPK ").

Tools

Noesis

For more details on this program, please visit the Noesis page.

Noesis supports the format by default.

QuickBMS

For more details on this program, please visit the QuickBMS page.

You can extract CPK archives using this script.

List of games using the format

The list is not complete! Feel free to add other games that are known to use aforementioned format.

PlayStation 3

• Dragon's Crown
• Hyperdimension Neptunia
• J-Stars Victory Vs

PlayStation Portable

• Fairy Tail: Portable Guild
• Fate/Extra
• Fate/Extra CCC
• Sakura-Sou no Pet na Kanojo
• Sword Art Online: Infinity Moment

Multi-platform

• Bayonetta
• Metal Gear Rising: Revengeance