The Ultimate Vampire Resource and Directory

You awaken in a sealed wing of the Count's Transylvanian castle, seemingly restrictive but yielding further avenues of secret passages and unexpected exits to the intrepid and timely explorer. Over the course of a few days you need to cultivate a familiarity with the layout of the castle and the nocturnal activities of its primary resident, who chooses to make midnight snacks of you rather than a main course. An unpredictable day/night cycle forces your hand, necessitating finding a reliable light source and some means of staying awake -- or else you awaken the next morning back in bed, your possessions pilfered by the kleptomaniacal creature of the night and your neck boasting irritated bite marks. Each day you must incrementally approach your goal of overcoming the Count.

Vic-20

The VIC-20 (Germany: VC-20; Japan: VIC-1001) is an 8-bit home computer which was sold by Commodore Business Machines. The VIC-20 was announced in 1980,[2] roughly three years after Commodore's first personal computer, the PET. The VIC-20 was the first computer of any description to sell one million units.

Also for Apple II, Atari 8-bit, Browser, Commodore 64, TI-99/4A, TRS-80 | Combined View