HHofH is a free download now, and runs well in dosbox on Windows and Linux (and probably everything else).
Hugo's House of Horrors was made in 1991, which happens to be the same year I got my first computer. It's the first game I ever played on a computer, and it was the coolest thing ever. While playing that, 15 years ago, is when I realized that I wanted to learn how to make something like that.
So basically, HHofH was what inspired my first interest in programming.
This is a meaningless random-thought. But I installed dosbox this weekend and re-beat the game (after 15 years, I only remembered a couple bits of it). And it felt good to play it again.