About Scream Machines, This is a rollercoaster simulator that allows you to build your own track layouts, and then go for avirtual ride. Currently, the game supports 20 different track styles, and 39 different trains. Youcan create racing and dueling rides, and complete with dispatch synchronization. You can also play Ride Op, and have total control over the ride, including transfer tracks. Share your creations onlineon one of the fan-created exchange sites. Create hills and valleys, and lakes and rivers using theintegrated Terrain editor. Includes 55 demo tracks.