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