40 hours in the weeks before release isn’t normal in the industry :)
And I wouldn’t say they’re encouraged. 40 hour week is what you should be doing. Organisers leave after those hours, and you’re encouraged to be there within these hours as its when you can receive mentoring. Anything you do outside of those hours are personal preference.
There is no one pushing you to work longer other than the team’s desire to do it themselves.
Dropping tools at the end of the working days isn’t the norm in game dev, hell its not even the norm in any code dev. A demo is due and you have to get the work done to get it ready for the deadline imposed, if that means you need to schedule a few extra hours in the evening, well, welcome to the computer software industry.