I got my steam deck today and downloaded portal one. I was playing the first test chamber and pressed the back buttons my accident and jumped. HOW HAVE I LIVED MY WHO LIFE thinking that I would never need back buttons on any controller! I feel like I can't play any other game the same ever again because of the steam decks back buttons.

I've also known about gyro too but I love being able to play overwatch (test it really) and use the gyro as a form of aim assist. The deck being able to use this in a non steam game is literally game changing. It is seriously an awesome handheld that I will definitely be playing more with than I thought I would.