Victory in this game is completing the Domination Ritual.
Defeat is if the Master is freed from your control.Visitors will arrive periodically, and their desire to leave will rise naturally and spike if they see something supernatural.
They can’t leave due a barrier, and once they discover that, Visitors will go to the Library and research ways to escape, learning how to cure your servants, escape the manor, and even defeat the Master. Most will choose to leave, but some will remain to attack you in an attempt to save your servants.
Before that happens, you’ll want to transform them into your servant. Turn them into a Maid by Deep Sleeping them and dressing them in Maid clothes, infect them with an Alraune seed and wait for them to turn, beat them down and turn them into Beegirls, have a Succubus Mark them, haunt them, and then finally transform them, hell, just get them so corrupt that they agree to work for you of their own free will.
When you have too many of one servant, or just someone you don’t like, you can Exchange them for Contribution. They’ll go to the front yard and wait for pickup, after which you get a nice chunk of gold.
Spend this gold on items to upgrade your servants, Room Upgrades to increase the amount of servants you can support, increase your maximum Mana, and even transform your Maids again to specialize them for specific tasks.
The Domination Ritual, and thus Victory, requires Champions. If you spend too much mana/contribution, a Champion will be dispatched to ‘investigate’ the manor (Police will also be dispatched for missing persons, but they’re irrelevant and easy to handle).
These Champions are powerful combatants and know everything about the Manor without needing to research it first. They have to find evidence you’re kidnapping people, and you can get them to leave if you catch them trying to break down locked doors enough.
To win, though, you’ll need to defeat them and take their Champion Item. Champions failing to return calls down a deathstack on your head, Teleport the Manor using 100 mana and the button in the Master Suite before they arrive unless you’re really confident in your combatants.
Once you have enough, you can begin the Domination Ritual in the Ritual Room. Doing so causes all hell to break loose, and the Ritual itself takes a long time, but completing it grants you Victory and the ability to upgrade your rooms beyond their natural limits.