Life state

Each expansion pack for The Sims 2 released to date has added an alternate state in which sims can exist. These states have unique triggering techniques, advantages and disadvantages. These states are:
 * Humans (or Sims)
 * Ghosts (The Sims 2)
 * Aliens (The Sims 2)
 * Zombies (University, FreeTime, Apartment Life)
 * Vampires (Nightlife)
 * Servos (Open for Business)
 * Werewolves (Pets)
 * PlantSims (Seasons)
 * Bigfoot (Bon Voyage)
 * Genie (FreeTime)
 * Witches (Apartment Life)

Each life state offers new opportunities for the sim, making certain aspects of play easier to handle and others harder. However, all above creatures that appeared in Sims 2 were also in original The Sims games. In Sims Livin' Large, there is purple potion which can turn your sim into a monster. Also there are ghosts and zombies, and in Sims Unleashed there is Palm Read Lady which can cure zombification. Aliens are there every night, sometimes they take sims who use telescopes. Genie and Servo were added in Sims Livin' Large, and they look very similar to these that comes with Sims 2 Open for Buisness and Sims 2 FreeTime. Werewolves, vampires, plantsims and bigfoots are added in Sims Makin' Magic. When a sim makes the Beauty or the Beast charm and then use it, he/she can be transformed in any creature from this list and much more. But when they are transformed, they still have the same abilites like normal sims. Witches and warlocks comes with Sims Makin' Magic, and there is a whole new world for them.