Here is the full list of all 31 Sinless achievements.
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Have a "dead end" conversation
Be annoying
Get a cornbun
Get a score of 12000 in Ghostface
Not dress properly
Look carefully
Look at yourself
Change the light
Beat the game
Complete the third act
Get a score of 5000 in Ghostface
Get 30 kills in mojojoe
Get 10 kills in mojojoe
Use a levelhack
Fix the cyberslut
Get a Prog pro
Complete the second act
Get an apple
Use a prog hack
Fix Poochie
Get something from Anne
Lose
Complete the first act
Check out the picture
Pop the Prog
Check newsfeed
Play ghostface
Get a pearpod
Make bed
Start the trip