Like so many stories lately, this one comes from Twitter:
A very long thread of LUA voyeurism unfurls from there, including screenshots of amusingly candid comments in the code, hidden debug levels that were accidentally shipped, and some dialog lines that never get triggered due to bugs (Grim Fandango sympathizes). Even Psychonauts team members like Erik Robson (Lead Designer) and Kee Chi (Programmer) end up weighing in, so passionate fans of the game (and isn’t all of us?) might enjoy diging through.
It’s worth pointing out that @ScrungusCrungus seems to have been part of an effort to reverse-engineer Psychonauts for some time now, and past discoveries made along the way have also been documented for those who crave more.
Source: Twitter