Agent Roy: Secure the Temple

Freelance Agent Roy is deployed to protect the VIPs in the temple. Roy cursing the day he ever came to this island, is now facing artillery fire from a mysterious militia group swarming the temple. With their boat destroyed and weapons stolen, Roy now finds himself facing an army of mercenaries, with nothing but a gun and his wits to survive. Roy informed his team with the coordinates, and they need 5 minutes to reach the island. Agent Roy is now facing his most challenging task to date. How long can Agent Roy Secure the temple and protect the VIPs from the mercenaries?