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