.COK File

File extension cok is mainly associated with the legendary Carmageddon computer game. Carmageddon is the first of a series of graphically violent driving-oriented video games produced by Stainless Games, published by Interplay and SCi.

A .cok file appears to be some kind of patch file which was used to update the game.

How to open:

These files are likely used to patch the original Carmageddon game only.

How to convert:

As far as we know, there is no way and most likely also no reason to convert .cok files to anything else.