This is completed level Island. (You can call it beta too). There is own English dubbing and Czech subtitles. The isn't .cry file or .bak file so you can't edit it but if you are member of FarCry modders I can send you .cry file to edit it.
A little challenge: try to be first who find easter egg :-D, if you send me description of easter egg as private message I'll answer every your question about mod and give you some extra info.Little help to find easter egg: call someone by phone to see dead body near warehouse.
If you load game in cave, you can not continue because invisible wall do not dissaper.