One of the first things I wanted to do after getting my Steam Deck was test Super Smash Bros. Melee. Not just to see how well it performs, but also examine online play and see how the controls feel in my hands. How to Get Melee/Slippi Working on Deck If you’re looking at getting online play set up on Linux, you can refer to the guide I wrote a few months back.
Slippi Launcher version 2.5.0 released a few days ago. The developers acknowledged that this is a big version difference from the previous 2.1.15 release and said that they’ve “been hard at work on a lot of developer side improvements that will make it easier for us to work on some big features we’re really excited about.” So first thing’s up, Dolphin updates are now transparent and done in the background. This means less waiting for the application to start.