Here is the full list of all 40 Leap of Faith achievements.
End up with Robin
End up with Kira
Collect at least 30 images on your phone
Lie at least three times during one playthrough
Find three easter eggs
Message Steph before you meet up with her again
End up with Stephanie
Successfully sneak up on Steph
Don't set Chris up with someone
Try, but fail setting Chris up with someone
Jump out the window at Steph's place
End up with Kira and Robin
Complete every task on your phone
End up with Holly
Have a threesome
End up with Lexi
End up with Linda
Achieve a perfect score when helping Cece remember
Reach full speed at the bowling alley
Unlock every dialogue option when sunbathing with Holly
Aquire 5 romantic trait points
Aquire 5 atletic trait points
Aquire 5 flirty trait points
Set Chris up with someone
Find Robin's pin-code
Show great expertise as a rear end identifyer
Leave Steph behind
Reach max points with at least 5 people in your contact list
Nuke something
Unlock the party on the plane
Flex at every opportunity
Get a hold on Lexi's number on your own
End up with Cece
Play through the game once
See a minimum of 20,000 screens in Leap of Faith
Well, that was unexpected
Sleep with 5 different girls in one playthrough.
Stick to one girl all through the story
Comment on every nuke you can
Don't lie at all during a full playthrough