The Riddler Mindbender, Steel roller coaster at Six Flags Over Georgia, US

The Riddler Mindbender is a steel roller coaster at Six Flags Over Georgia in Austell, Georgia. Its green track forms two 17.1 m vertical loops, a helix and a tunnel along a 991.5 m course built into a ridge, with part of the track descending into an adjacent ravine. Trains reach 80.5 km/h.

Designed by Werner Stengel and built by Anton Schwarzkopf, Mind Bender opened on March 31, 1978, billed as the world's first triple-loop coaster. It was the park's last original coaster until Georgia Scorcher in 1999. Painted green in 1997 for Gotham City, it closed after 2019, was renamed The Riddler Mindbender, and reopened on September 18, 2021.

The name and green paint date from 1997, when Jolly Roger's Island became Gotham City and the coaster was restyled as a creation of Batman's enemy, The Riddler. The trains were painted black with green question marks, and the waterfall beneath the track was dyed green, as it occasionally still is.

Riders must be at least 1.07 m tall. The ride runs two seven-car trains, four riders per car in two rows of two, held by individually ratcheting lap bars. The reduction brakes have no overhead cover, so the coaster may close when rain makes them slippery.

The ride was billed as the world's first triple-loop coaster, but it actually has two vertical loops; the diving helix into the ravine is sometimes counted as the third. In 2008, its 30th season, Amusement Today ranked it 15th in the Golden Ticket Awards, one of only two pre-1980 coasters on the list alongside Shockwave at Six Flags Over Texas.