Not all companies track sprints by the hour. :) Dev times for AAA video games are in years, not months. After working for both web and game companies, I find the development mindset for each to be remarkably incompatible.
They have this crazy idea called "crunch time" which seems to be the same thing as "all the time". Also, because so many people go into CS programs because they want to make games, game companies aren't forced to pay very high salaries.