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