Jedi fallen order

Hey there. You don't have to have played Fallen Order. I'd recommend you do though. For one, it's a great story so it's awesome to play through Cal's journey from the beginning. Also, his abilities are expanded in the second game so if you go back to Fallen Order after playing Survivor, you might be missing those abilities. If that's not something you're concerned with, feel free to play them out of order :)