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The Challenge: Battle of the Seasons is the 23rd season of the MTV reality game show, The Challenge. Although sharing the same name as the show's 5th season, Battle of the Seasons, unlike other sequel seasons is not distinguished as part "II" as the Season has a completely different format. The season took place in Bodrum, Turkey and Swakopmund & Windhoek, Namibia.
Former casts from select seasons of MTV's The Real World and The Challenge competed with the hopes of winning a piece of the $250,000 grand prize. This is the first season since season 12 that does not include any cast members from The Real World: Key West.
The season premiered with a special 90 minutes episode on September 19, 2012, and concluded its run on December 19, 2012, with the reunion episode.