Among Us first launched for iOS and Android in June 2018, followed by PC via Steam in November 2018.
Here is an overview of the game, via Nintendo.com:
An online and local party game of teamwork and betrayal for four-to-10 players…in space!
Play with four-to-10 player online or via local Wi-Fi as you attempt to prepare your spaceship for departure, but beware as one or more random players among the Crew are Impostors bent on killing everyone!
Watch the Switch launch trailer below.