Super Smash Bros. Ultimate

Super Smash Bros. Ultimate^[b] is a 2018 crossover fighting game developed by Bandai Namco Studios and Sora Ltd. and published by Nintendo for the Nintendo Switch. It is the fifth installment in the Super Smash Bros. series, succeeding Super Smash Bros. for Nintendo 3DS and Wii U. The game follows the series' traditional style of gameplay: controlling one of the various characters, players must use differing attacks to weaken their opponents and knock them out of an arena. It features a wide variety of game modes, including a campaign for single-player and multiplayer versus modes. Ultimate features over 80 playable fighters, including everyone from all previous Super Smash Bros. games, alongside several newcomers. The roster ranges from Nintendo mascots to characters from third-party franchises, with the game being supported with post-release downloadable content that adds more.

Planning for the game had begun by December 2015, with full development starting after the completion of 3DS/Wii U's downloadable content (DLC). Series creator and director Masahiro Sakurai returned along with Bandai Namco Studios and Sora, the studios that developed 3DS/Wii U, with the return of the studios speeding up the preparation process. Sakurai's goal with Ultimate was to include every character from previous games despite the various development and licensing problems this would cause. Several well-known video game musicians contributed to the soundtrack, with Hideki Sakamoto writing the main theme "Lifelight".

Nintendo teased Ultimate in a Nintendo Direct in March 2018 and fully revealed it at E3 2018 the following June. It later received two additional dedicated Nintendo Directs before releasing on December 7, 2018. The game received universal acclaim, with some critics calling it the best of the series. They praised its amount of content and fine-tuning of existing Smash gameplay elements, although its online mode received some criticism. By December 2019, the game had sold over 17.68 million copies worldwide, making it the best-selling fighting game of all time.