[ashdnazg]

The bare basics are working with a hex editor and understanding data types - ints, floats, null-terminated strings, length-prefixed strings etc.

I'd recommend taking a well documented binary file format (Doom WAD file?), go over the documentation, and see that you manage to see the individual values in the hex editor.

Now, after you have a feel for how things might look in hex, look at your own file. Start by saving an empty project from your program and identifying the header, maybe it's compressed?

If it's not, change a tiny thing in the program and save again, compare the files to see what changed. Or alternatively change the file a tiny bit and load it.

Write a parser and add things as you learn more. If the file isn't intentionally obfuscated, it should probably be just a matter of persevering until you can parse the entire file.

[tapia]

Thanks. That is kind of what I imagined. But I am not good at understanding the information from the hex editor. Reading the article I was a bit lost with the terms like little-endian and thought that that might be someone important concept to know for the task . I guess that that is what I should learn first.