Comment by pvitz

A shot in the dark, but maybe you could give me a hint. Recently, I was interested in extracting sprites from an old game. I was able to reverse the file format of the data archive, which contained the game assets as files. However, I got stuck because the image files were obviously compressed. By chance, I found an open source reimplementation of the game and realised it was LZ77+Huffman compressed, but how would one detect the type of compression and parameters with only the file? That seems a pretty hard problem or are there good heuristics to detect that?