NORMAL AND POSSESSED ENDINGS
You will get one of these endings when you beat the Final Boss of the game.
The ending which you get is dependent on a " point" system. If at the end of the
game you have less than 4000 points you will get the Normal ending, if you get
more than 4000 you will get Possessed. The points are awarded as follows:
- Each kill by Shooting or Fighting = 10 points
- Each point of Damage received = 1 point
- Choosing the " I forgive you" option in the Confessional Booth = 1000 points
It is not currently known whether or not any actions in the game will lower
your point score.
http://db.gamefaqs.com/console/ps2/file/silent_hill_3_b.txt
D´après cette FAQ pour augmenter les chances d´obtenir la fin posseded il faut pardonner Claudia dans le confessional...