On: The Quest for a Universal Translator for Old, Obsolete Computer Files

[voltagex_]

File formats are fascinating: https://github.com/corkami/pics/blob/master/binary/README.md

For game file formats you may want Xentax (http://forum.xentax.com/) or the "fork" Zenhax (https://zenhax.com/)

Open some files in a hex editor and have a look. Run "strings". Investigate and learn.