I suppose theoretically, if all else fails, you could try valerian, but I've no idea how effective it would be or how big the dose would need to be.

And... this is partly guesswork, but one of the formative games in my childhood was The Colonel's Bequest which had a room where weapons were kept in plain sight (sort of; these are DOS graphics we're talking about) in display cabinets, yet inaccessible. Go to screenshot 10. As magycmyste said, in 1995 you can probably find something different, but hopefully it'll be a start anyhow.