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.
Become the Staring Contest Champion!
Let someone pay for parking tickets.
Deliver Grahams letter.
Win a Staring Contest Fight!
Play Alex' new video game.
Subscribe to the Coaches Channel.
Make fun of 10 workers.
End ten encounters without saying No.
Don't hurt the janitor imp!
Design your first character.
Complete the story.
Complete chapter 7.
Complete chapter 6.
Complete chapter 5.
Complete chapter 4.
Complete chapter 3.
Complete chapter 2.
Complete chapter 1.
Say "No!" 999 times.
Say "No!" 99 times.