This article is about Gotcha Force TXG file format and ongoing researchs on it. See TXG (File format) for TXG file format description.
This section is currently being written.
More research is needed and some paragraphs may be wrong.
TXG file format is an archive whitch contains TPL. Following class is interesting for documenting the file format:
https://github.com/Struggleton/TXG2TPL/blob/master/TXG.cs
Further investigations are needed.