The title of the game even says its just a mission(mission: WWI Dogfight). It says expansion pack for the award winning flight simulator x right where you buy it. Of course you need flight simulator x to run this.
My Red Baron 3D is getting long in the tooth now. I have an up to date PC, yet this thing won't fly. So it may very well be my fault that this game doesn't run on my computer. I'm not a techno geek. What they really need to do is make a stand-alone version of this game. You need to have Flight Simulator X in order for it to run (which cost me another $50). Disappointing, because I'd love to see a new WW 1 flight simulator. Be sure to read the fine print- it's an add-on, not a stand-alone game.