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