How (Not) to Make a Game Sequel

I have recently started to work on my third Steam game: Spaceship Idle , which is a sequel to CivIdle , which itself is a sequel to Industry Idle . CivIdle is my first sequel game, and I’ve learned a lot during its development: some worked well, others not so much. I’ve decided to write down all the lessons learned for my own sake, and hopefully, they are an interesting read as well. What Works…