Glass

As a bird in a cage witnessing the resolution of "Cinderella," the player is an observer with very limited control over unfolding events.

For me, the sidelining of the player and the corresponding independence of conversation created a potent illusion of a deep world. Beyond this, the game was made enjoyable by clear options, a good set of endings, the ability to mess with the characters, and wickedly droll humor. But these are just good craftsmanship, and icing on the cake; there really isn't much to Glass beyond a little experimental envelope-pushing with the player's role and choices. For players, this is maybe thirty minutes of entertainment, light as meringue.

For authors, it may be something more. Limiting the player's control of events is not new (cf. Rameses), but I believe that the illusion of depth produced here is a significant technical breakthrough for NPC interaction complementary to those explored in Short's Galatea (and faintly reminiscent of what was so successful about Bob in She's Got a Thing for Spring).

In any case, this little game is as gratifyingly virtuosic as it is trivial.