Excitement, or Excitement Rating, is one of three Ratings combined to determine the quality and enjoyability of a ride in the RollerCoaster Tycoon series of games. Excitement is measured on a scale that starts at 0 (very dull), and which in theory can be infinitely high. It is exceptionally rare (though possible, but very few people have done this) to get an excitement rating above 10 without using custom scenery or CTR. Excitement is used primarily as a judge of ride design, and also determines how much guests will pay for ride admission. In scenarios, it is not recommended to build a coaster in a scenario with an excitement above 8. This is because after this point, the cost required to increase the rating goes up dramatically. Also, despite the ride, most guests would not be able to aff