I saw eye.pak and darkmoon.pak in GOG games, Forgotten Realms Archives disk also have those files. I tried to extract them with unpak tool but unlike other .pak files they didn't work :S those files are really required for play the games ?

Try to delete them and see if game will work;)

On serious note, extension "pak" is quite generic, and might mean wide variety of algorithms of packaging files.

Alternatively, instead of deleting them, rename them out of the way. That way you can easily undo the change.

I am not asking about generic .pak files . There is one biggest .pak files in each game folder . (EYE.PAK in EOB1 and DARKMOON.PAK in EOB2) And unpak programs can't extract them unlike other .pak files in game directories.

Game won't work without those files.

"Pak" IS generic file extension. Different developers have their own file packaging algorithms and many of them share some generic name like "pak".

In other words it was never intended for that file to be opened by standard file archivers.

Nope you didn't understand me . I am not speaking about "red" pak files . there is one extra .pak file in "green" box . I saw that in Forgotten Realms Archives disk and GOG version . Other copies of the game (floating on internet) don't have this .pak . I can't compare with floppy versions because I didn't have them .

Maybe it just contains those red EOBDATA1..6.PAK files and the installer unpacks it to separate files. If you use a hex editor and search the file you'll find the EOBDATA1.PAK .. 6.PAK filenames in it. Even parts of the files in it.

Maybe in some game versions the installer deletes the file after unpacking and in some versions it doesn't delete it. When the games were released, having a 1.5 megabytes junk file on your hard disk might have been signifigant but not so much anymore when Forgotten Realms Archives was released.

I'm just kidding, the file actually contains the dungeon levels 13-15 where you finally confront Gagyx himself.

I thought this too but install file itself in game folder didn't work like this . Maybe there is another program extract them l but probably game disk didn't include it . Anyone could confirm this isn't a necessary file ?