Corkscrew Follies is the first expansion for RollerCoaster Tycoon that adds new themes, 32 new scenarios (including one "real" park - Alton Towers, and a previously downloadable one - Fort Anachronism) and new rides. New gameplay-oriented features are added as well. Certain roller coasters are updated to support more complex designs with bigger loops, and more ride types can change their paint jobs. (mobygames.com)