I have to admire what they could and couldn't do with video game chiptunes.
E.g., to go from this:
to this:
Like I wonder if it breaks some poor composer's heart to have their amazing masterpiece work, confined to a representation in a 30-second loop with 64kb of memory and 8 midi channels. In context, good soundtracks tend to stay good soundtracks, even if chiptunes lose so many details and subtle aspects of the arrangement. I suspect that part of the job of BGM composers back then was to create songs that could still sound good on that form factor.