Originally Posted by Leffmann
What compression and disk format did they use in the earlier Putty games? If you were to have 3 disks of uncompressed data in AmigaDOS format, then I can see how you can get close to squeezing all of that onto a single disk if you tailor the compression and use something more clever than MFM encoding with a higher linear density.
The game has 60 odd levels and reviews at the time said it was 2 disks. The one disk demo is heavily compressed and only just fits on one disk, and that has 8 levels! So the full game is definitely 2, hence why Mark's comments about "a disk" are so badly written.