I beleive you are talking about the sequel to Ultimate Ride. Its a game for the PC. I have the original game. Its a lot of fun if you like designing roller coasters. You get to design your coaster and the ride it and there is a campain mode that allows you to build up expertise as you design coaster for specific landscapes of requirements.
I have heard the good is just ok, but if you love coasters, the game to get is Roller Coaster Tycoon, escpecially now that they have released a brand new version.