Fish Bowl

You, the PC, are Larry, a beachcomber with little to your name. A mysterious fish bowl appears in your shack one day, triggering a series of ominous events.

In true game logic, each event is triggered by someone seemingly innocuous, only significant because of the relative nothingness. It's pretty short, but structured as two parallel threads, one of which bleeds into the other. The elements of one are mirrored in the other and invite replay.

This may not be the most polished, but it is certainly effective in telling a bleak, surreal horror story.