A citrus-flavored soda developed in the 1940s by Barney and Ally Hartman, beverage bottlers in Tennessee. A revised formula was created by Bill Bridgforth in 1959. High-fructose corn syrup replaced sugar in the 1990s, though today there is a modified variant made with cane sugar known as Mountain Dew Real Sugar. A zero sugar variant was introduced in 2020. It is notable for including orange juice in the recipe. a b Conley, Mikaela (15 December 2011). "Flame Retardant in Your Mountain Dew? Yep". ABC News. Archived from the original on 16 December 2011. a b Stanford, Duane D. (17 April 2012). "PepsiCo Aims to Bring Urban Cool to Mountain Dew Image: Retail". Bloomberg. Archived from the original on 26 February 2017 . Retrieved 17 November 2012.

A honeydew/melon variant exclusive to Walmart stores, released in March 2020 as a permanent flavor. [25] [26] A zero sugar variant was introduced in 2021. [27] In 2018, it released in Maverik gas station locations and was discontinued a few months after its release. Tanner, Steve (29 March 2005). "Update: Mountain Dew LiveWire". BevReview. Archived from the original on 7 July 2011 . Retrieved 1 February 2011. a b Taylor, Tarah (10 August 2012). "Who should claim Mountain Dew? An age-old debate for you to decide". WCYB-TV. Archived from the original on 5 April 2013.He named the Dew". Toledo Blade. 13 November 1999. Archived from the original on 22 December 2015 . Retrieved 7 November 2013. Mountain Dew Game Fuel 2016 leak". Facebook.com. 23 May 2016. Archived from the original on 29 May 2017. An orange variant introduced in 2003 as a limited-edition flavor for the summer. [8] In 2005, after two years of limited summer releases, it became a permanent addition to the product line. [9] Sheehan, Gavin (2022-06-15). "MTN DEW Announces New Overdrive Flavor Only At Casey's". Bleeding Cool News And Rumors . Retrieved 2022-06-15.

An orange variant launched as 'Amp Game Fuel' in 2019 with the launch of Call of Duty: Modern Warfare. Pelisek, Christine (19 April 2000). "Offbeat: Mr. Happy Does the Dew". Los Angeles Weekly News. Archived from the original on 16 October 2007. Online Game lets Players Create a New Dew". Promo Magazine. 8 November 2007. Archived from the original on 15 July 2011. In 2007, after using the term "Game Fuel" to market their sodas to the video-gaming subculture, Mountain Dew introduced a new flavor variant (citrus cherry) with the Game Fuel name. Coinciding with the release of the Xbox 360 game Halo 3, Mountain Dew Game Fuel sported a label that was almost entirely image-based, showing promotional artwork for the game and featuring the game series' main character Master Chief prominently. This variant remained on shelves for 12 weeks, and was discontinued afterwards. [50] MTN DEW Cake Smash wants to give everyone a celebratory do-over". FoodSided. 2021-06-25 . Retrieved 2022-03-09.Rudenko, Anna. "4sight and PepsiCo Team up to Create Ownable Brand Equity with New Mountain Dew". Archived from the original on 7 May 2012 . Retrieved 29 March 2012. PepsiCo. "MTN DEW® FLAMIN' HOT® BECOMES THE OFFICIAL DRINK OF HELL AND YOU CAN JOIN THEM THERE…IN HELL, MICHIGAN THAT IS, AS NEW PRODUCT RELEASES NATIONWIDE". www.prnewswire.com . Retrieved 2023-01-07. MTN DEW VOO-DEW flavor shakes up spooky and sweet for Halloween". FoodSided. 2022-10-31 . Retrieved 2022-11-01. A berry variant was released to coincide with the release of the video game Ryse: Son of Rome for the Xbox One.