Fall Guys: Ultimate Knockout is a platformer battle royal game developed by Mediatonic and published by Devolver Digital. It released for Microsoft Windows and PlayStation 4 on 4 August 2020. The game draws inspiration from game shows like Takeshi's Castle, It's a Knockout and Wipeout, and children's playground games like tag and British bulldog. Fall Guys received positive reviews from critics, who praised its chaotic gameplay and visual appearance.

Up to 60 players compete in matches with battle royal-style gameplay. Players, represented as jellybean-like figures, move around a three-dimensional playing field, with additional moves such as jumping, grabbing/climbing, or diving to assist gameplay. The aim is to qualify for subsequent rounds by successfully completing each of the randomly selected mini-games. Certain mini-games involve running towards a finish line at the end of the map, while others add elements of teamwork. On every mini-game, obstacles appear around the map for added complexity. Players who are too slow or who fail certain requirements for a mini-game are eliminated. On the final round, the remaining few players compete in a final match with a randomized mini-game designed for a smaller player size. The winner of the match is the last player standing.

Using an in-game currency, "Kudos", players can purchase cosmetics and emotes for their character to show off in-game. Players obtain Kudos by completing matches and get "Crowns" (the premium currency) by winning. Some of the costumes are of characters from different games, such as Gordon Freeman from the Half-Life series or Jacket from Hotline Miami. The game supports microtransactions for the purchase of additional in-game currency.

Within 24 hours of release, the game had drawn over 1.5 million players. On 10 August 2020, Devolver Digital announced that the game had sold 2 million copies on Steam.