I think it's safe to say that this game did not cost 400m and was probably a lot less. Not one industry source can back this up, and most people in the industry and saying that figure makes no sense.
The developer had 12 employees in 2019, Sony only came along in 2023, and Probably Monsters did not have that much money hence why they sold and downsized shortly after.
We also know Fire Walk does not have that many employees, less than 200, and the game had no licensing fees and a smaller marketing budget. Colin said this did not include the buyout of the studio, which makes the case of 400m being even less. Plus most of the work was done by cheaper outsourcing studios.
I really don't see how 400m is possible, that's more than The Last of Us and Horizon combined and Sony only had them for 1 and a half years.