Red Dead Redemption 2: Undead Nightmare 2

Undead Nightmare 2 is an expansion pack for Red Dead Redemption 2 made by Rockstar Games that adds a whole new story mode, focusing on Arthur Morgan as he searches for a way to stop the outbreak of supernatural creatures spreading around each of the states; not only zombies, but also vampires and werewolves.

The story of Undead Nightmare 2 is non-canon, because it coincides with the same timeline as Red Dead Redemption 2.

Undead (Zombies)
The undead are humans who were infected with the Mask's curse. They show no emotion, and only have the goal of feasting on human flesh, infecting more humans in the process. There are four types of Undead.
 * Normal - Slow, but can run for short periods of time. Can only be killed with a headshot or being lit on fire, but can be stunned with non-headshots.


 * Bolter - Fast zombies that are hard to hit. Can only be killed with a headshot or being lit on fire, but can be stunned with non-headshots.
 * Bruiser - Big, durable zombies that can charge and knock the player down. Can only be killed with a headshot or being lit on fire.
 * Retcher - Zombies that spit toxic snot at the player. Can only be killed with a headshot or being lit on fire. They explode upon death, which can kill the player.

Vampires
Vampires are either people infected with the Blood Curse or were born as so. They show pure hatred towards humanity, killing and draining the blood of their victims. They are strictly nocturnal, as sunlight burns them. There are three normal types, plus a fourth boss type.
 * Normal - Vampires with no special abilities, but are the only type that can carry firearms. Can only be killed with Silver Cross, Silver Ammo, Holy Water, Holy Light, Ornate Dagger, or just being hogtied in place until daylight comes. Garlic wreaths repel them, but do not kill them.
 * Swarm - Vampires that can transform into a swarm of bats to attack the player, but are generally easy to kill. Can only be killed with Silver Cross, Silver Ammo, Holy Water, Holy Light, Ornate Dagger, or just being hogtied in place until daylight comes, as they cannot transform into a bat swarm unless they jump. Garlic wreaths repel them, but do not kill them.
 * Shadow - Vampires that can transform into a shadowy mist which can be hard to spot by the player during the night, and can ambush the player by doing so. Can only be killed with Silver Cross, Silver Ammo, Holy Water, Holy Light, and Ornate Dagger. Can be hogtied, but can transform into shadowy mist and escape. Garlic wreaths repel them, but do not kill them.
 * Overlord - Beastly, large, powerful vampires that no longer look completely human, but a combination of man, bat, and dragon. They have the ability to fly, and can instantly kill the player by pinning them and draining their blood if the player doesn't break free. Can only be killed with Silver Cross, Silver Ammo, Holy Water, Holy Light, and Ornate Dagger. Cannot be hogtied. Garlic wreaths repel them, but do not kill them.

Werewolves
Werewolves are people who can transform into a bipedal, wolf-like beast under the Moon Curse, and have a savage hunger and a vigorous instinct to hunt. They have immense strength and are very fast. They are nocturnal, but can only be found during a full moon. They can be skinned for their pelt, meat, etc., just like regular animals. There are four variants plus a legendary boss variant that can be found in Tall Trees.
 * Timber - A werewolf with black colorations much resembling a timber wolf. Can only be killed with Silver Ammo and Ornate Dagger.
 * Grey - A werewolf with grey and white colorations much resembling a grey wolf. Can only be killed with Silver Ammo and Ornate Dagger.
 * Rougarou - A light brown variation of werewolf that can only be found in Bluewater Marsh and Bayou Nwa. Can only be killed with Silver Ammo and Ornate Dagger.
 * Snowy - A white variation of werewolf that can only be found in Grizzlies West. Can only be killed with Silver Ammo and Ornate Dagger.
 * Legendary Alpha - A massive legendary albino battle-scarred variant that is found in Tall Trees. Can only be killed with Silver Ammo and Ornate Dagger.

Undead Animals

 * Undead Rabbit
 * Undead Rattlesnake
 * Undead Chicken
 * Undead Cat
 * Undead Goat
 * Undead Sheep
 * Undead Dog
 * Undead Pig
 * Undead Fox
 * Undead Coyote
 * Undead Grey Wolf
 * Undead Timber Wolf
 * Undead Peccary
 * Undead Wild Boar
 * Undead Cougar
 * Undead Panther
 * Undead Pronghorn
 * Undead Bighorn Sheep
 * Undead Whitetail Deer
 * Undead Elk
 * Undead Black Bear
 * Undead Grizzly Bear
 * Undead Alligator
 * Undead Cow
 * Undead Ox
 * Undead Bison

Mythical Animals and Cryptids
There are three types of cryptids, one unique to a mission, and (TBD) mythical creatures in the game. Upon approaching the territory of one, a message should appear in the top left corner. These messages say: "You have entered the area of a recent sighting of a cryptid. Hunt this cryptid by finding clues of its whereabouts." or "You have entered the area of a recent sighting of a mythical animal. Locate this mythical animal by finding clues of its whereabouts."

Sasquatch (Cryptid)
Sasquatches are tall, hairy humanoids that are very elusive. They are mostly peaceful, but if shot, can go aggressive. They can be found in most states, but are quite rare. They can be tracked, but their trail can be quickly lost even in Eagle Eye. They can be skinned for their pelt, meat, etc., just like regular animals. There are three variants, plus a legendary variant that can be found in Grizzlies East, Ambarino.
 * Regular - Dark brown and black variants of Sasquatch that can be found mostly in Tall Trees, but can sometimes be found in Big Valley.
 * Yeti - White and cream yellow variants of Sasquatch that can only be found in Grizzlies West.
 * Skunk Ape - Rusty red and light yellowish-brown variants of Sasquatch that can only be found in Bluewater Marsh and Bayou Nwa.
 * Legendary - A large, battle-scarred Sasquatch that can be found in Grizzlies East, Ambarino. This variant is more aggressive than normal Sasquatches. Unlocked after completion of Supernatural Hunter IV. (See Challenges).

Chupacabra (Cryptid)
Chupacabras are large, hairless canines that are very elusive. They have long, black quills that run along their back. They are equipped with two large canine fangs used to drain blood from livestock. They can be skinned for their skin, meat, etc. just like regular animals. There are two variants plus a legendary variant that can be found near the Rio Del Lobo formation in New Austin.
 * Male - Dark grey with long black quills running along their back.
 * Female - Light grey with shorter black quills running along their back. Smaller in body size than males.
 * Legendary - A battle-scarred melanistic male Chupacabra with white quills running along his back. Only found near Rio Del Lobo rock formation in New Austin. Unlocked after completion of Supernatural Hunter III. (See Challenges).

Goatman (Cryptid)
The Goatman is a goat-headed, large, black humanoid with glowing red eyes and long horns. The Goatman is unique to the Obediah Hinton survivor mission "An Unforgivable Sin - IV" (see Missions) at Butcher's Creek, where Arthur must search for a special black goat as a sacrifice to the pentagram at the abandoned shack outside of Butcher's Creek's boundaries. Upon being killed, its horns can be cut off as a trophy.

The Four Horses of the Apocalypse (Mythical Animals)
The Four Horses of the Apocalypse are unique horses with unlimited stamina, invincibility, and their own unique special abilities. They are found in separate areas on the map. The Four Horses of the Apocalypse consist of: War, Pestilence, Famine, and Death.
 * War - A crimson-colored horse with flames trailing from his mane and tail. His special ability is igniting every enemy he comes in contact with. He can be found in the open desert near Armadillo, New Austin.
 * Pestilence - A red-eyed albino horse with blood dripping from his eyes, patches of scars on his body, and a green miasma emitting from his body. His special ability is stunning enemies on contact. He can be found in Tall Trees.
 * Famine - A dark brown horse with locusts swarming his body. He is the fastest of the Four Horses, and his special ability is to send swarms of locusts at enemies. He can be found near Butcher's Creek in Roanoke Ridge, New Hanover.
 * Death - A multi-colored black, brown, and grey horse with ghastly white eyes and a white mist trailing from his body. His special ability is to explode the heads of the Supernatural upon coming in contact with them. He can be found anywhere on the map, but has the highest chance of spawning in Bluewater Marsh, Lemoyne. Alternatively, he is rewarded after completion of the Undead Nightmare 2 story mode.

Unicorn (Mythical Animal)
The Unicorn is a very rare mythical animal that can be found anywhere on the map. It is pure white, and has a trail of rainbows shooting from its back. It has infinite stamina, and cannot die from fall damage, as it slowly hovers down to the ground while it is in the air.

Manmade Creature (Mythical Animal)
The Manmade Creature is a mythical animal unique to the survivor missions "The Mad Scientist - I", "The Mad Scientist - II", and "The Mad Scientist - III". In the third mission, the creature comes to life as an abomination and starts to go on a violent rampage throughout Annesburg. Upon killing the Manmade Creature, its bear heart can be cut out as a trophy.

Story Missions
Coming soon.

An Unforgivable Sin
A four-part mission that involves Arthur Morgan as he helps out Obediah Hinton of Butcher's Creek draw out the demon that curses Butcher's Creek.
 * An Unforgivable Sin - I - Arthur searches for the source of the demonic hauntings within Butcher's Creek, which eventually leads to the abandoned shack on the outskirts of Butcher's Creek that has a glowing red pentagram underneath.
 * An Unforgivable Sin - II - Arthur finds out how the goats are connected to the demonic haunting after being attacked by multiple possessed goats with glowing red eyes after going back to the pentagram.
 * An Unforgivable Sin - III - More possessed animals attack Butcher's Creek and Arthur must help out by killing these demonic animals.
 * An Unforgivable Sin - IV - Obediah Hinton tells Arthur of a mysterious black goat that was seen shortly after the demonic attack, and how a possible sacrifice of this specific goat could lure out the demon. Arthur captures this goat and leads it to the shack as so, and upon sacrificing it upon the pentagram, it glows a bright red and transforms into the Goatman, blowing up the abandoned shack in the process. Arthur is faced with the task of killing the Goatman and sending it back to hell.

The Mad Scientist
A three-part mission that involves Arthur Morgan as he helps out a mysterious scientist by the name of Frank Styne bring a new species of animal to life.
 * The Mad Scientist - I - Dr. Styne needs help with a special elixir that consists of Creeping Thyme, Gold Currant, and Wild Mint. After Arthur finds all these ingredients, and the elixir is made, the two find out that the elixir did nothing to the creature, but attracted a horde of Undead that begin to swarm the house. Arthur must defend the house from the Undead horde.
 * The Mad Scientist - II - Dr. Styne wants Arthur to meet up with Marko Dragic at Doverhill for help on getting electrical power from lightning. Arthur finds out that Marko is being held hostage in his own lab by a group of vampires. After killing the vampires, Marko gives a few electrical conductors to Arthur, despite heeding warnings to Arthur about Dr. Styne.

More coming soon.
 * The Mad Scientist - III - After discovering a massive hole in the house along with Dr. Styne's mutilated body and the creature missing, Arthur finds out the tracks lead to Annesburg, where the creature is on a rampage, murdering animals, people, etc. Arthur must kill the Manmade Creature before it harms more innocent people.

Challenges
There are four challenges in Undead Nightmare 2, each with about 5 tasks for each challenge. Each challenge rewards ammo and sometimes unique weapons.

Supernatural Hunter

 * Supernatural Hunter I - Kill 100 normal undead. Rewards: 50 Silver Revolver Cartridges
 * Supernatural Hunter II - Kill and skin 50 undead animals. Rewards: 50 Silver Repeater Cartridges, 50 Shotgun Ammo.
 * Supernatural Hunter III - Successfully bait in, kill, and skin 5 Sasquatches and 15 Chupacabras. Rewards: 100 Silver Repeater Cartridges, 50 Silver Shotgun Ammo, 25 Silver Rifle Ammo
 * Supernatural Hunter IV - Hunt and kill the legendary Chupacabra. Rewards: Unique "Chupacabra Slayer" LeMat Revolver, 150 Silver Revolver Cartridges.
 * Supernatural Hunter V - Hunt and kill the legendary Sasquatch. Rewards: Unique "Sasquatch Slayer" Buffalo Rifle, 100 Silver Rifle Cartridges.

Supernatural Sharpshooter
Coming soon.

Supernatural Alchemist
Coming soon.

Four Horses of the Apocalypse

 * Four Horses of the Apocalypse I - Find and tame Pestilence. Reward: Pestilence Blood Pact
 * Four Horses of the Apocalypse II - Find and tame Famine. Reward: Famine Blood Pact
 * Four Horses of the Apocalypse III - Find and tame War. Reward: War Blood Pact
 * Four Horses of the Apocalypse IV - Find and tame Death. Reward: Death Blood Pact

Werewolf Hunter
Coming soon.

Vampire Slayer
Coming soon.

Holy Priest
Coming soon.

Commando
Coming soon.

Undead Gunslinger
Coming soon.

New Weapons/Ammo

 * Torch
 * Silver Cross
 * Scorpion Revolver
 * LeMat Revolver
 * Buffalo Rifle
 * Blunderbuss
 * Crossbow Pistol
 * Silver Crossbow Bolts
 * Silver Revolver Cartridges
 * Silver Pistol Cartridges
 * Silver Repeater Cartridges
 * Silver Rifle Cartridges
 * Silver Shotgun Shells
 * Holy Water
 * Holy Lamp
 * Boom Bait

New Equipment
More coming soon.
 * Blood Pact

Trivia

 * The legendary Werewolf in Tall Trees is a reference to the rumor of a werewolf in Tall Trees in Red Dead Redemption. However, the werewolf in Red Dead Redemption was proven fake.
 * Dr. Frank Styne is a wordplay on the famous character Dr. Frankenstein.
 * The Manmade Creature is a reference to the "Manbearpig" from South Park. The Manmade Creature appears in the base game as an easter egg, but never comes to life.
 * The Scorpion Revolver was Red Harlow's personal weapon from the first Red Dead game, Red Dead Revolver.