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Super Mario Bros. 35 is an online multiplayer platform game with battle royale elements. Developed by Arika and published by Nintendo, the game was created to celebrate the 35th anniversary of Super Mario Bros. in 2020. It was released on Nintendo Switch as a free download for members of the Nintendo Switch Online service on October 1, and is set to remain playable until March 31, 2021.

The game features the classic platforming of Super Mario Bros., with 35 players competing in real-time in a battle royale format. Enemies that the player defeats are sent to other opponents using one of four targeting options. The game features power-ups that can be obtained by spending collected coins on an "item roulette" and a timer that can be extended by defeating enemies and completing levels. Super Mario Bros. 35 received mixed reviews from critics, praising the game's unique concept of combining Super Mario Bros. with battle royale gameplay, while criticizing the game's repetition and simplicity.