You are going to try a short survival-horror game about the Scientist experiment. He works with the controlling Human Test Subjects. The results of work should help you with the task. The matter is you are trapped in a bunker with the monster. The hostile Entity has attacked your laboratory so that you need to save your life and get out of the trap. The Possession Experiment is similar to well known Silent Hill and Resident Evil with new features of other horror games you tried. Are you ready?