I am attempting to write a savegame editor. The save file in question uses some type of compression. I am wondering how the decompression algo can be determined.

Thanks for any suggestions.

Hello 2_a_day !

You need to debug the game which stores the savegame. You must find the compression algorithm there as well as the decompression. If you're lucky you can recognize it as a well known one, if you're not you need to copy the code from the program to your source. Be sure to check if it's compression or cryptography, because you may be hunting a ghost if you don't know what you're looking for.