Here is the full list of all 22 Say No! More achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Say "No!" 99999 times.
Say "No!" 9999 times.
Play Alex' new video game.
Subscribe to the Coaches Channel.
Don't hurt the janitor imp!
Let someone pay for parking tickets.
Say "No!" 999 times.
Complete the story.
Complete chapter 7.
Complete chapter 6.
Become the Staring Contest Champion!
Complete chapter 5.
Make fun of 10 workers.
Complete chapter 4.
Complete chapter 3.
End ten encounters without saying No.
Win a Staring Contest Fight!
Complete chapter 2.
Deliver Grahams letter.
Complete chapter 1.
Say "No!" 99 times.
Design your first character.