I never did finish Hacker, but I came very close before I timed out and was caught. Only recently did a coworker tell me that the trick is to manipulate the time of day to buy a little extra time. My favorite title in the bunch was Portal, a sort of Hypertext adventure story from 1986. I wouldn't mind reading through that again.
Today, I keep a couple emulators installed on my old tablet and fire up Castle Wolfenstein from time to time. I'm not very good at it, but I love it anyway.