Good ending 1
Description: in the finale, Jonathan and Elizabeth Ashbury kill Sir William and travel to America to find a cure for Lady's illness.
How to get: you cannot kill a single innocent citizen of London. Remember that this does not apply to NPCs that you encounter during main or side quests and a choice must be made. It also does not apply to enemies. We're talking about the rest of the innocent citizens you might meet on the streets of London.
Good ending 2
Description: in this ending, the same events will take place as in the first good ending, but instead of going to America, Jonathan and Lady will stay in the castle, trying to find a cure.
How to get: you can kill only a few citizens for the entire passage, but only one is better.
Bad ending 1
Description: the finale shows how the Lady, having killed Sir William, burns herself to prevent the spread of the disease to other people. Jonathan managed to save the world, but his soul could not stand it, so he remains all alone on the hill.
How to get: this ending can be unlocked after killing most of the population in every borough of London. You can try to kill some VIPs or Pillars of each area. In general, if you have all the districts in the "Hostility" status, you did everything right.
Bad ending 2
Description: the game ends in a similar way to Lady committing suicide by stepping into the fire, but Jonathan is not as badly hurt and continues to feed his terrible and greatly exacerbated lust for blood.
How to get: this ending will only happen if you manage to kill every citizen in the game. It sounds too tragic and difficult, but this is the only way to get a second bad ending.