After going for a brain scan you awaken in a dark mockery of the hospital you were in. Not having any other option, you advance through the twisted reality you awoke in, hoping to find some answers about your current existence.
Level loading might take some time. If your operating system thinks the game crashes during loading, it mostly likely isn't crashed. Just wait for it to load and for the game to generate the necessary map cache files.
Known bugs: one particular 3d mesh might not show up at the start of the 2nd map. The cause is currently unknown, since the mesh comes with the main game and is not a custom mesh.