Pertti the Poltergeist Purger

"In a small town, an old castle has been put up for sale. The real estate firm tasked with selling it have had no luck because the rumours say that its haunted. Therefore, they have decided to hire a professional to investigate the castle and take care of eventual problems. Unfortunately the Ghostbusters™ were too busy to take on the job (and they would have been rather expensive as well), so they hired the next best thing: YOU!" This is a short (5–15 minutes) first-person horror shooter experie...