Arcade gamer Billy "King of Kong" Mitchell has successfully won a defamation lawsuit against Australian YouTuber Karl Jobst, securing nearly a quarter of a million dollars in damages. As reported by PC Gamer, Jobst, known for his content on competitive and speedrunning gaming, featured Mitchell in a video titled "The Biggest Conmen in Video Game History Strike Again!" which garnered 500,000 views. The court ruled that Jobst's video contained defamatory, inaccurate, and unsubstantiated claims against Mitchell.

In 2018, Mitchell's title as the "King of Kong" was stripped when his scores were removed from Twin Galaxies' leaderboards amid allegations that he used a MAME (Multiple Arcade Machine Emulator) instead of arcade cabinets to achieve his records in games like Donkey Kong, Pac-Man, and Donkey Kong Jr., a practice against the rules. After six years of defending his records, Mitchell's accolades were reinstated in Twin Galaxies' "historical database" and his high scores were also recognized again by the Guinness World Records in 2020.

Mitchell's defamation lawsuit against Jobst was not related to the validity of his Donkey Kong scores but stemmed from Jobst's 2021 video. In the video, Jobst suggested that Mitchell's previous lawsuit against YouTuber Benjamin "Apollo Legend" Smith resulted in Smith having to pay $1 million in damages and contributed to Smith's suicide in 2020. The video also implied that Mitchell had expressed joy over Smith's suicide. After Mitchell threatened legal action, Jobst edited the video, and Smith's brother confirmed that no money was paid.

Jobst acknowledged his defeat on X/Twitter, stating that the judge found Mitchell to be a credible witness and believed his testimony entirely. Jobst emphasized that he did not accuse Mitchell of cheating and that his claims about Smith were based on incorrect information from multiple sources. He expressed regret and gratitude for the support he received, vowing to repay those who supported him.

In a subsequent update, Jobst reiterated his stance against allowing "a bully to control my free expression." The judge ordered Jobst to pay $187,800 (AU$300,000) for non-economic loss damages, $31,300 (AU$50,000) for aggravated damages, and $22,000 (AU$34,668.50) in interest, totaling approximately $241,000.

Billy Mitchell gained fame in the arcade gaming community by achieving a perfect score in Pac-Man during the '80s and was further highlighted in the 2007 documentary, King of Kong, which documented his rivalry with Steve Wiebe.