Magnesium Ninja has released Ascension, a freeware side-scrolling horror game for Windows set within a plague-ridden skyscraper.

Ascension gives players limited visibility in the skyscraper's dark corridors; while you have a mouse-controlled flashlight, it will attract attention from enemies, and your character will need to hold his breath in darkness in order to avoid being seen. It's creepy stuff! Developer Magnesium Ninja recommends playing in a dark room with headphones to get the most from the experience.