Scream Machines is a new Roller Coaster Simulator, it's not a game in the strict sense of the word; you don't have any goals or scenery to complete in order to progress.
It's just intended to let you create and ride you own coaster creations!
System types include tube, square, I-beam, L-Beam and wire. You can have up to 10 tracks per map and there are 23 different train styles. | 
