An Interactive Cinema Journey for Windows, IMDB has the descriptions if you would like to know more about the story. It is kind of hard to explain and it is better to just be thrown into it. A mix between Myst and an interactive movie with tons of different paths and endings. So many I still haven't seen them all after 15 years. The first one isn't great but The Vortex is definitely one of the most original games i have ever played and i highly recommened it.