Roller Coaster Factory 2

Summary
Roller Coaster Factory 2 is a low budget game in which you can design the scariest rollercoaster rides you can imagine as well as ride them. The coasters can be made from wood, steel and, new in this release, as "inverted" coaster (where the track isn't under, but over the car).

The users can exchange their creations via the Valusoft Coaster Exchange website.