Beat this one without tips is not for everyone. Capcom Quest of Gregory Horror Show! A classic horror from Japan that became a game by Capcom.
If you like to analyze each conversation of npcs this game is for you.
Theoretically what you should do is use a certain object to defeat each of the 12 enemies, but figuring out which object, will take a lot time. That's because it's not that obvious, and to find out you'll have to pay attention to the conversations.
A good example is this fairy dog. To defeat her you have to wait a certain time of day and deliver an adult magazine to Gregory, so she can watch your TV and leave her soul on the table.
Your HP will decrease by the time, there are even healing items but they are few ones, you will have to sleep to recover HP, but it will only work if your character is sleepy, otherwise you won't recover that much.
The real problem is the enemies don't die, they will go after you wanting for revenge. And be prepared to die a lot, because when the mansion is full of them, there will always be one in your way.
But my favorite is definitely JUDGEMENT! This one won't chase you, but the final quest will ask you a lot of questions about the guests' lives..
In the end, it even seems to have a sequel, but that never happened in games, only in animation.