As you might expect, lycanthropy-cursed Sims have to watch out when it comes to their relationships. Transformation occurs whenever a full moon rises, but can also sneak up on you and occur at inopportune times if your Sim’s mood ever gets too low. Unlike the full moon transformation, though, the mood-based switch lasts for a tunable duration, which you can affect as you build up your Lycanthropy Skill. Additionally, werewolves can transform at will, and doing so enables you to bounce back to your human form whenever you choose. Be warned, though, when a Sim transforms back into its human form it will be disoriented, and transforming is taxing on your Sims’ hunger meter.
Not quite the crazy wolf-man you might expect.
Disorientation doesn’t sound good, right? Well, that’s pretty tame compared to what your werewolf might do if he’s around company. Whether you spawn your werewolf inside the included Moolight Falls city, or add them to your current town, you won’t ever have to worry about them accidentally hulking out and murdering your friends. “In pre-production we had a tendency to go a little too dark,” said Leslie, but “it’s probably darker than…what’s been done in The Sims before.” So, no, your werewolf won’t kill people, but they will cause fear in fellow Sims, might randomly kiss them and could destroy property around themselves.
Here’s the link for the full article: Howl at the Moon — Werewolves and The Sims 3: Supernatural