The first sub-arc of The Adventure Zone: Balance, named Here There Be Gerblins, was later adapted into a graphic novel in cooperation with artist Carey Pietsch, and was published by First Second Books in 2018. The book topped the New York Times' best-selling trade fiction list, becoming the first graphic novel to do so. It was followed by a second graphic novel, Murder on the Rockport Limited!, in 2019, and a third installment, Petals to the Metal, in 2020.
McElroy has appeared as a voice actor in several animated series, including Clarence, Big City Greens, We Bare Bears, and Camp Camp. He also provided voice commentary for the 2017 video game 100ft Robot Golf, alongside his brothers. In September 2018, following a successful podcasting campaign, the McElroy brothers, Travis and Justin, confirmed that they would be voicing the character Skyscraper in the film Trolls World Tour, with Griffin also voicing Country Tear.