Sherlock. My father has done more than 30,000 games of Sherlock.
Other than that, he knows about/supports/likes to watch most FPS games I used to play (Duke Nukem, Serious Sam, etc) and RTS ones. And shits on me for playing RPGs.
edit: My mom doesn't really know or understand any of them really. Not even things that I've tried to get her to try.