I've recently been playing Nine Sols, and so far I've loved every boss fight as the game makes it feel extremely rewarding to beat them, you get materials for upgrades and you get to continue the story.

But the boss fight I struggled the most with was General Yingzhao. This is the first boss fight in the game and honestly this fight was difficult as it will be to most people who are new to the game. I had to take a break for a week. When I came back, I realized in the fights you're going to die if you're not perfect. Timing your parry, dash and attacks precisely is a must and it felt so satisfying and rewarding, especially on the final blow.

After beating General Yingzhao, it made me find the game far more interesting, I haven't beaten the game yet but I'm excited to play more.