In an unfamiliar and gloomy area of the woods, you come across a small, tumbledown shed. You must be near what local folklore says is the Castle Vampira, named after its infamous mistress, the Countess Vampira, known for her dealings with the nether world and its creatures...
Peering into the shed you can see a hole in one corner and what seems to be an old rickely ladder leading down into the darkness...
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Going from the opening screen and the fact that it has RPG elements, there's a chance this could be a reworking of Chateau Galliard
http://solutionarchive.com/game/id%2C2422/Chateau+Gaillard.html
Interesting. Thanks, Paul, we will investigate further. Given that the other games on the compilations were adaptations of known titles we have been looking for possible sources for this one too.