File Extension Library


.C4U File Extension

  • Developer by: Open Clonk Development team
  • Category: Game Files

What are .C4U files and how to open them?

Can't open .C4U file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .C4U file.

What is a .C4U file extension?

.C4U file extension is created by Open Clonk Development team. .C4U has been classified as Game Files.

.C4U is OpenClonk update system data

The c4u file extension seems to be used for one of the default file types used in the OpenClonk video game.

Used for updating purposes. Typically found as update.c4u.


How to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be converted to anything else.

How to fix problems with .C4U files

  1. You need to update the application that you normally use to open .C4U files. Only the latest version of the software supports the current .C4U file format
  2. You need to check the .C4U file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)