Directly to you from Twitter:
The #ARMS Ver. 5.1 update is now available to download!— Nintendo Versus (@NintendoVS) February 1, 2018
・New Tournament Mode
・New Gallery feature
・New additions to Party Crash
View full patch notes: https://t.co/s0vedUgzmi pic.twitter.com/orCCZOEZb9
…Wanna play? Buy a Switch.
And if you’ve already got yours, click on Arms for everything you need to know about the game. 😀