Shade

Surrealist interactive fiction is largely an untapped resource, and this well-written and well-crafted little game shows what the genre is capable of. It's atmospheric, creepy, and suffused with a sense of inexorability that builds as the player finds him- or herself moving things along towards a foreboding conclusion.

The ambiguous ending frustrates a lot of players, but I appreciated it. It seems clear enough to me--the game isn't excessively complex--Plotkin just never states it overtly. Surely there's room in the canon for a few intentionally unresolved endings, and if they belong anywhere, it's in a surrealist game.