It is a flight simulator game which when fully updated exceeds 80GB (Yes, eighty gigabytes). It has the terrain of the whole world, and guess what? It's free too, and guess what again? It's on linux too.
well, here is the game's official website
http://www.x-plane.com/
The full game is too large to download, so you'll have to order the DVDs
NOTE: The full game is less than 60GB, but the fully updated full game can exceed 80GB
NOTE: You require a Joystick to play.
here are just some screen shots of the game...




If there is already a topic about X-Plane, I am sorry, but the search didn't return anything similar to X-PLane















