The PC successor to the PlayStation title Medal of Honor is a highly regarded first-person shooter. Medal of Honor uses the Quake III engine and puts you in the role of an intrepid World War II infantryman...
You've snuck aboard an enemy ship that's bound for a distant island by hiding inside a crate. Once all cargo is off-loaded and the coast is clear, you break cover. You find yourself in a quasi-operational Dyson sphere.