Here is the full list of all 14 CORPSE FACTORY achievements.
Forge a bond with Aoi.
Clear the bonus mode.
Unlock the true ending.
Unlock the hell ending.
Clear the game.
Unlock the false ending.
Unlock the bonus ending.
Complete the final act.
Complete Act III.
Complete Act II.
Complete Act I.
Forge a bond with Tomoe.
Forge a bond with Shinya.
Complete the prologue.