The Messenger (original French title: Louvre: L'Ultime Malédiction, "Louvre: The Final Curse") is a 2001 adventure computer game developed by Canal+ Multimedia and Index+, and published by DreamCatcher Interactive and Microïds.
The developer's synopsis, transferred from the description on the actual game box:
Morgan Sinclair, a Secret Service Agent, has been charged with the mission to retrieve 4 artifacts, called Satan’s Keys, from the Louvre Museum. These four keys, when joined together, cause complete global annihilation. Go back in time to three periods in time when various kings used the Louvre as their residential palaces: Charles V Mediaeval period, Henry IV Renaissance period, Louis XV 1789 French Revolution period, and return safely to present day. In this race again evil and against time, you as Morgan must find the keys before the vengeful descendants of an evil cult of Black Templars combine these mystic artifacts triggering Armageddon.