Here is the full list of all 56 Inside Jennifer achievements.
Jennifer plays with Jimmy in front of Mark
Console Dimitri in his time of need
Take pills
Press the HOT angle button
Catch the thief
Hold Kelly's hand
Eat at a diner
Press the angle button
Don't wait for Mark
Make the first choice
Press the red button
Settings
Get married to Mark
Cheat on Mark at the wedding
Stay true to Mark
Stay true to Mark... As much as you can
Jennifer ends Jimmy
Jennifer pays Jimmy back
Mark and Jennifer die
Mark attacks Jimmy
Jennifer gets fully corrupted by Jimmy
Jimmy goes to jail
End up with Laurie
End up with Tim
End up with Laurie & Tim
Become the new dean
Hope gets rid of Julius alone
Blackmail Hope
Snitch on Hope
End up with Julius
End up with Paul
End badly with Paul
Ian carjob...
Call Ian over for emotional support
Get back at Mark by spending the evening with Ian
Dimitri sells the store
Help out a stranger
Go shopping
Check up on Laurie and Dimitri
Get fired from work
Make up with Mark
Prank call
Go on vacation
Get hired without having to do the job interview
Fail the job interview... Miserably
Spy on a couple in the park
Use one toy
Use two toys
Clean Mark's mess
Don't clean Mark's mess
Spend some time with Paul, late in the night
Deny Kelly
Laurie drinks a spiked drink
Make a scene in the subway
Get every ending
If in danger: press P