Space - virtual or real - offers a container where an unlimited number of narratives - related or not - can happen. Rather than “stories,” world builders create "narrative architectures," possibility spaces within which unpredictable events unfold in dialogue with a set of pre-scripted narrative elements and technical infrastructures. While the temptation to overdetermine narrative paths and outcomes lurks around every creative corner, the potential rewards for maintaining an open system of narrative possibility remain great. What kind of spaces, designed or otherwise, are most conducive to the richest variety of narrative possibilities? What principles from the real world field of architecture may be most productively deployed in the digital or metaphorical spaces of designed worlds?