I'm not sure if anyone has been watching the new documentary series about Psychonauts 2's development, but it's really incredible. Filmed over 7 years, covering everything from the earliest stages of concept, through the final ship date. It's a really raw look at game development, and the clashing personalities and work styles, difficulties really finding the game, the disaster of losing their publisher... And best of all it shows the journeys of some of these people, and what drives some of them to quitting or burning out.
It's also really interesting to see the journey the game itself took, how close the game was to being really bad, and how many things they tried to get some of these ideas to work.
It's something like 25 hours, but it's really one of the best looks at behind the scenes game development ever.