Snow Fall: The Avalanche at Tunnel Creek is an immersive story experience using a variety of different media simultaneously to provide a multi-sensory digital experience.
This is a different approach than Transmedia Storytelling. Rather than spreading story elements (in different media/experiences) across platforms, this approach combines them all into a single experience which is, by nature, cross platform.
You can experience the story for yourself at: http://www.nytimes.com/projects/2012/snow-fall/#/?part=tunnel-creek
This blogpost is from www.rethinkeverythingblog.com/2017/10/08/a-glimpse-into-the-future-of-storytelling/