invader-extract is a command-line tool included in the Invader project used to reconstruct source tags as best as possible from their in-map representation. It is the best-in-class extractor and is our recommended tool when tag extraction is necessary. It supports H1X, H1CE, H1PC, PC demo, and also PC beta 1749.
Regardless of the tag extractor, it is impossible to reconstruct original child scenarios from the merged scenario present in a map.
See official documentation for usage instructions.