Millennium Force design and development phases of Millennium Force took place over five years. The first rumors that a new record-breaking roller coaster would be built at Cedar Point, which included speculation about a ten inversion roller coaster from Bolliger & Mabillard and an Arrow Dynamics MegaLooper, began circulating in early 1998. A roller coaster from D. H. Morgan Manufacturing was also rumored. On July 2, 1999, Cedar Fair Entertainment Company filed a trademark for the name Millennium Force, which raised more speculation about what the ride would be like. About a week later, the first track pieces were seen at the
Millennium Force lift and similar layout but has different restraints; it uses shoulder harnesses instead of lap bars. Leviathan opened at Canada's Wonderland in May 2012 breaking as well. Manufactured by Bolliger & Mabillard, it uses a chain lift instead of a cable lift. Millennium Force has one of the longest lines in the park, with passengers waiting over four hours when the ride debuted. The ride received positive reactions from visitors, many of whom said it was smooth and very comfortable. Others said, "It'll scare the daylights out of you". In its first six years of operation, Millennium Force had over