Puzzle Kortrijk

For several centuries stories have been told about this abandoned house here on the Pottelberg. It all started in 1798 when a mysterious and strange couple with their 2 children came to live in the house. According to some stories there were nights where you could hear strange sounds far outside the house. No one dared to contact them. 3 years later they moved out of the house and since then the house has been empty for centuries. According to some locals they still hear strange noises but nobody believes them. A few weeks ago, the Kortrijk city council called on Magdalena James, an English researcher specialized in the paranormal, to investigate what is going on in the house. After James entered the house, however, after a little less than 1 hour, contact was broken off. To this day, no trace of her has been discovered. We need your help. What is going on in this ancient mysterious house?

About a month and a half ago, a tour in a medical examination lab went wrong. Playing children knocked over a number of products and a chemical reaction took place. Deadly gases started to spread. The poisonous gases quickly spread through the air in Kortrijk. Luckily, we now all have mouth masks on and we didn't get infected. But this will not continue, the gasses will spread and become more poisonous. We need your help to find substances in the lab as soon as possible to make the vaccine so we can start vaccinating the population!