Fast RMX

Like most racing video games, players must reach the end of a track as soon as possible. Unique to the Fast series is the polarity mechanic, where players collect boost energy by switching between two colors. Each color has respective boosts and jump pads, which can only be used if a player is currently its respective color. Upon completing a race, players are rewarded a number of points, depending on which place of 8 they finished in.

At the end of a cup, the player must rank in the top 3 of racers to unlock the next cup. The player has 12 cups of 3 courses available, with only 3 cups to choose from at the beginning of the game. The game can also be played online with up to 4 players locally and up to 8 players online.

The game fully supports the unique control options and features of the Nintendo Switch, such as HD Rumble, motion controls, single Joy-Con play, and the Nintendo Switch Pro Controller. The game is capable of running in up to 1080p at 60FPS in docked mode.

The game was released on 3 March 2017, for the Nintendo eShop as a launch title for the Nintendo Switch. It was announced on 5 March 2017, that, like its predecessor, the game would be receiving free updates with extra content in the future. The first major update was released on 19 April 2017. It was confirmed to include a Time Attack mode and online friend support. An additional free update was released on 13 September 2017, which added 6 extra courses, improved AI, fixed bugs, and added friend list activity features.

Like the game's predecessors, Fast RMX is often compared to the games of the F-Zero and Wipeout series.

On Metacritic, the game holds a Metascore of 81 out of 100 points, based on 54 reviews. 7/5, praising the game's diverse selection of vehicles and tracks. 4 out of 10 points, describing it as a "[...] racer that borrows heavily from the classic Wipeout and F-Zero games."