The Sims 2: Pets/Werewolves

Werewolves are a type of supernatural creature which the Sim can interact with or even be transformed into. Sims exist as Werewolves only during night hours. A Werewolf can teach a pet faster than humans and can fight against burglars. They might occasionally howl at the moon, howl at player's command, or howl to summon wolves. When a werewolf howls every sim's bladder on the lot goes down halfway. To become a werewolf, players should have many trees, weeds, and untrimmed hedges on their lot to attract wolves, and must build up a relationship with any wolf with glowing eyes (the werewolf pack leader). The pack leader will eventually "nibble" the Sim it was interacting with, causing it to become a werewolf. .