Saros, Returnal & "Training"
One thing I'm really loving about Saros right now, which I also loved about Returnal, is how it trains you to be good. So when you finally get to the truly insanely difficult parts, it's sooooo rewarding because you're genuinely really really good. And it's because this game forces you to get good. Tonnes of trial and error, tonnes of practice.
And then it's so satisfying!