Ah the good ol' games. Loved to watch my dad play this when I was a little boi (MAH BOI). When I mean old I mean 1999. Lol.
Click this image for wiki info:

FPS Flight Sim of pure aweseomeness. I still have it and play single and multiplayer.
The game itself is so well constructed, in some levels (liek dark evile levels), it scares the stuff out of me AND my dad. :\ The reason is because alot of it is dark and misterious. The sounds Outrage Studious make for enemies and some damage you take from certaint enemies can, inevitably, scare you stuffless. When you get hit by one of these forgeters pictured below, the sound grinds your gears and makes you shiver you pants off.
Screeny:
