I remember being terrified of Dragon's Lair when I was a kid (because of the whole turning into a skeleton when you die thing), and Hunt the Wumpus on the old TI/99 was terrifying because if you made a wrong move it would jump to a screen of a pair of jaws closing on you to the tune of the Death March
I was pretty easy to scare back then though, since reading Cave of Time was enough to make me avoid the library altogether for a year or two
