Here is the full list of all 14 CORPSE FACTORY achievements.
Unlock the true ending.
Forge a bond with Aoi.
Unlock the hell ending.
Clear the bonus mode.
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 Shinya.
Forge a bond with Tomoe.
Complete the prologue.