Flight 57

Each one of Brian Hess's wads revolves around some sort of central theme. His other DM maps include a junkyard with a magnetized plasma rifle, a mariner in which you can go underwater, and a large boat in the middle of the ocean. Usually with new graphics of some sort to complete the theme. This one of course is on a plane. Wish he made more stuff!

This is a technically cute level from 1995, with ambient sounds! The design reminds me of that Unreal Tournament map where you fight on a spaceship, although it's much cruder. You can't explore this in single-player if you use Zdoom, because the player one start is too close to a barrel; it works fine in PRBoom however.