Ending A: Edit
"Fortes Fortuna Juvat" (Latin for "Fortune helps the brave") - Fiona struggles to get the key into the lock. Hewie calms her fears and she manages to unlock the door. However, Hewie begins barking which catches Fiona's attention. From the double doors, Debilitas comes out with hedge clippers. In a tense and awkward moment, Fiona and Debilitas stare at each other. Debilitas then simply bows to Fiona, showing that he means no more harm to her, and possibly thanking her for sparing his life. With that, she and Hewie leave the castle. Debilitas looks at the overgrown trees in the garden and begins clipping them as he hums to himself. To get this ending, the player must defeat Debilitas using the chandelier. This does not kill Debilitas, but rather causes him to retreat and thus no longer pose a threat for Fiona during the remainder of the game. This is considered as the best ending.
Ending B: Edit
"Ignis Aurum Probat" (Latin for "Fire tests gold") - similar to Ending A, except that Debilitas does not appear. As Fiona is opening the castle gate, she stares at the castle for a few moments, before turning and following Hewie into the forest. To get this ending, the player must have Fiona kill Debilitas.
"Dona Nobis Pacem" (Latin for "Grant us peace") - similar to Ending A, except that Debilitas does not appear. Lorenzo calls out to Fiona not to go and falls down the stairs, loathing the fact that she has left. To get this ending, the game must be completed once. Debilitas must be defeated with the chandelier. Fiona must visit Debilitas in his hut, where he will give her the "Smudged Key" that opens one of the locked bathroom stalls, which reveals a hidden cellar. In that cellar, Fiona finds the key to the castle's main gate.
Ending D: Edit
"Tu Fui, Ego Eris" (Latin for "What you are, I was. What I am, you will be") - Fiona wakes up in a glass box where Riccardo taunts her and says she belongs to him. She screams in her frustration. Fiona is likely raped off-screen - even more disturbing because Riccardo could be viewed as Fiona's uncle. Later, in a castle bedroom, Riccardo tenderly strokes Fiona's head and her bulging stomach, as she is now heavily pregnant. As he walks away, she wakes, gives a faint smile, and issues a hollow laugh. To obtain this ending, Fiona must have a bad relationship with Hewie when she faints in the forest. Hewie does not save Fiona, either due to dying from Riccardo's gun attack or out of apathy due to Fiona mistreating him. This is likely non-canon as Fiona seems to care for Hewie very much.