Asylum

The story takes place in a labyrinthine asylum. One rather confusing feature of that labyrinth is that some sections of it seem to exist in several places at once. So an item dropped in a certain place will also show up in another place of the labyrinth, in a corridor of the same shape (but different orientation), and vice versa.

This game was technically a sequel to a game called Asylum on the TRS-80 and as a booter game for MS-DOS, however since the original game was only released on those two platforms, the sequel was called Asylum II on those systems, but just called Asylum on every other conversion.