Another is in approach to cleverness: I was taught that being clever was not actually a good thing in software development; it's more important to do things clearly and in a maintainable fashion—even if there are mild performance downsides.
In game development, it skews much further in the other direction: the player’s experience is *all* that matters. Take as many clever shortcuts along the way to eke out as many frames as possible—after all, you don’t have to maintain it once it’s shipped!