: Sims undergo a gradual "affliction" after being bitten, eventually transforming into a hunched, growling beast that can run on all fours.

: Introduces Sire/Sired relationships . Slaying your sire with a Silver Dagger is one method to cure the lifestate.

: Being a beast comes with "shedding" and "canine breath," which can be annoying if not managed through skills.