Thinking more on it, I am not too shocked that they would use uncompressed assets "at rest" on the machine. This is especially true for games mailed out on disks or cartridges. I'm still a little surprised, so the links are neat to read on.
I am kind of curious on why they wouldn't use compression in transport, as it were. I'm still mostly assuming that they do.
This list appears to be largely indie games, many with sizes under a gigabyte. I'm not sure why at-rest compression would be a high priority for a small team when their game fits on a $5 thumbdrive and will be compressed during the install process by Steam or Itch.
Check this out, you can sort by the number of submissions to filter out indie games https://docs.google.com/spreadsheets/d/14CVXd6PTIYE9XlNpRsxJ...
from https://github.com/IridiumIO/CompactGUI