Why working for >40h for any non_game_dev company is acceptable, but here this is big problem? especially that their biggest product of last half of decade is about to be released in next month?
In this side of the Atlantic, most employees can be ensured to be properly remunerated and if it is a recurring situation, place a complaint in the government agency that regulates work law, which will proceed to do the respective investigations on work abuse.
So if employees choose to be exploited, that is their own problem and should not complain if at the end get shown the door when hard times come up.