Royal Express takes advantage of so-called closed setting familiar to all fans of classic detective stories. The royal wedding and the fate of Europe are put at stake when an engagement ring with a rare diamond is stolen from the princess's compartment. Take on the role of a seasoned detective and solve this daring crime in a fascinating hidden object adventure game. As a police officer, you are to question the participants of the incident to expose the villain. However nothing is as it seems at the royal court. As you gather evidence and proceed on the investigation, you understand that everyone in this story has a skeleton in the cupboard and could have wished to break the engagement.