Suspiria, anyone?
Not the (rather incomprehensible) recent remake, but Dario Argento's original 1970 masterpiece about a ballet student arriving at a dance academy which is actually a witch coven. Keepsake is a lovely vintage adeventure game that seems to be using an engine similar to the one another, older classic game, Sanitarium, was made with. Throughout the evolution of the plot, there are many winks at Argento's visionary thriller, although the general atmosphere and spirit are quite different.
