Here is the full list of all 46 I fell from Grace achievements.
Solve your first puzzle!
End up on your mentor's shitlist
Have an affair
Decline to have an affair
Played it safe instead of giving Grace a pill
Gave Grace an unkown pill
Located Dave
Posed as a private investigator
Delivered drugs to Dawn
Gave up Ms. Jones
Deceived Harris
Conspire with the punk
Outwitted the detective
Hit the gym
Make some very poor choices
Prepare a long-pig dish
Get your comeuppance
Reach the True Ending
Find the lost locket
Killed a police officer
Put yourself first
Stayed with Grace
Spied on Harris
Stole a Sandwich
An ending betting your actions
Escaped the police station
Did some work on the elevator
Attended the house warming party
Beat the punk into eternal submission
Help the occult shop owner prepare a love potion
Gave the detective a pill for your freedom
Cause the death of your mentor
Offer vagrant a bed in the research ward
Force Grace to take medication
Test medication on Harris first
Killed the undercover cop with shotgun
Smuggled controlled substances for drug dealers
Caused distraction to enable your escape
Used the research reactor
Planted a car bomb
Used the fishing rod
Do Doris' bidding
Escaped the sewers
Found Stinky Pete
Cut your journey short by dying
Listened to music that brought your back