i got boxed version of this gem.
its total of 2 cds 1 data other one is full audio with 33 tracks
1st weigths 652 MB

gog release is too small and no audio tracks, i wonder why gog cut off all

I own the boxed versions of Messiah when the game first came out, as well...

If I remember correctly, there were a lot of promotional material in the form of movies on those CDs which takes up a lot space.

The GOG version probably cut out a lot of that stuff.