How to open .C4P files on iOS
To open .C4P files on iOS, there is no common native iOS support for Clonk player/group files; transfer the .c4p to a desktop (Windows/macOS/Linux) with Clonk installed to open it.
Step-by-step instructions
- There is no common native iOS support for Clonk player/group files; transfer the .c4p to a desktop (Windows/macOS/Linux) with Clonk installed to open it.
Common issues
The file opens in the wrong app or shows as an unknown file type
Many systems do not recognize .c4p as a user-document format. On Linux desktops it may be associated with the vendor MIME type for Clonk group files (application/vnd.clonk.c4group), but the correct handler may not be installed.
- Open the file from within Clonk instead of double-clicking it in the file manager.
- On Linux, check file associations for application/vnd.clonk.c4group and set Clonk (or a Clonk group-capable tool) as the default if available.
Clonk does not recognize the .C4P player profile
This can happen if the file is placed in the wrong folder, is from a different Clonk setup, or is incomplete/corrupted.
- Confirm the file is in the correct player/profile directory expected by your Clonk installation.
- Try selecting the player file explicitly using Clonk’s command-line parameters (if applicable).
- Re-download or re-copy the file to ensure it was transferred completely.
Cannot open on mobile (iOS/Android)
.c4p is a game-specific container used by Clonk and is not typically supported by mobile document viewers.
- Transfer the file to a desktop computer and open it with a Clonk installation.
- If you only need to share it, keep it as-is and avoid renaming the extension.
Security note
.C4P is a group/container format used by a game ecosystem; treat files from untrusted sources cautiously because container formats can be used to deliver unexpected content that triggers vulnerabilities in the consuming application.