Mansion of Oblivion

Long ago, in a mansion far away, a group scientists from the eastern union decided to work on a project that could potentially change evolution as a whole, One day a selected elite group of scientists decided to push evolution to the brink of cataclysm resulting in a freak science experiment gone wrong. You're colleagues have died and have taken a new forms as lifeless shells lusting for blood. Their spirits haunt the very halls that you stand in, and their dogs died hungry. Can you escape the mansion in time before you die?