There have been a couple of critically acclaimed short narrative games recently. Enough that I think they might merit their own little topic. Mostly indie, these are things that are movie length (~2 hours) or less, and are designed to be completed in a single session.
Some might be walking simulators, but a lot of walking simulators are mood or exploration based, rather than being linear narrative experiences.
A couple examples:
Wide Ocean, Big Jacket
Any favorites in this genre?