(WARNING: DO NOT UNDER ANY CIRCUMSTANCES TRY WHAT IS MENTIONED AT HOME.)
Music to listen to as you readThe Undead varry in how they are brought back to life through out all of their film apperences.
Here is a list:
Type 1: VoodooThe original Undead, Reanimated by Black Magic or merely a living person Brainwashed via drugs. May either do their creator's bidding or go insane and turn into Type 3. This is a common type encountered in video games
Type 2: ConstructSimilar to Frankenstein's Monster, this is the Undead you get when attempting to reanimate somebody/bodies from the dead With Science, often causing them to Come Back Wrong. If they go berserk, the good news is that they have an almost zero chance of spreading Zombification and creating a Zombie Apocalypse.
Type 3: Flesh-eatingYour typical B-Movie Undead, it eats the skin, brains, or various other organs from the living, typically turning them into other Undead. Can also be merged with Type 3 or 4.
Type 4: Plague-bearingCreated by a virus or occasionally machine or somesuch. These are the Undead that are guaranteed to turn others into members of the Undead due to their highly communicable virus or nanobots or whatnot.
Type 5: ParasiteThis type of Undead are created specifically via exposure to a form of parasitic lifeform, be it the only stage or part of a series of mutations. Good for video games, as the advanced mutations allow for advanced enemies and bosses to still be Undead.
Type 6: RevenantAn older variety, originating in European folklore, less prone to rotting and falling apart, which normally retains intelligence, and memories of its previous life. They are driven by a single burning purpose, most often vengeance or true love, driven by a desire so strong it can overcome even death. While conceptually very old, and the prototype from which many other undead derive, this type has fallen out of favor for more modern breeds of zombie, and for the bloodsucking vampire.