WMG / Amnesia: The Dark Descent

The Shadow isn't hunting Daniel, but it is still terrifying.
Alexander keeps telling Daniel he's "branded" by the cosmic guardian, implying ownership, simply because he touched the orb and by doing so, became "tainted", inadvertently invoking the relic's powers and channeling them into himself. The Shadow regards Daniel as much of its possession as the mysterious artifacts it usually guards - its so obsessed with him that it would kill anyone who dared make contact with him, and even ignore the two orbs currently residing in Brennenburg, making no attempt to recover them.
  • Reading the journals reveals the Shadow was merely following him from the archaeological expedition to Africa, to London, and across Europe. Heck Daniel was once spellbound by dreams, fell overboard from the SS Hortensia headed for London. Then something very large tried to take him away, before raising him up and putting Daniel back onto ship. True the man was a Walking Wasteland, but stayed in the same area for 25 days and the guardian didn't attack him.
  • Seeking Alexander's help pissed this nightmarish entity off, nothing much else. To this Lovecraftian-like being, the notion of being banished by its own Human Pet, enraged it. Only turning on the baron makes it happy again.
  • When Daniel gets imprisoned in the Cells, the Shadow gives him plenty of time to escape. It does not appear for some ten minutes. It eventually loses patience if Daniel stands idle, and doesn't leave. If Daniel leaves the cell, its spread stops immediately, averting a bad ending. Why does the guardian want Daniel to stop Alexander? Its fleshy matter manifesting behind Daniel like an Advancing Wall of Doom can only signify the entity is not "hunting" but forcing him to go forward, its advancements remind him there is no turning back from this dark descent. Any reluctance on the young man's part to defy Alexander's expectations enrages the "relatively-patient" guardian.
  • In the Cistern if Daniel idles again too long, it blocks the original route of escape with its fleshy residue; however, it will create a bridge on the other side that enables escape.
  • The Shadow's claim on the young man is why Daniel resurrects whenever he ends up dead in the castle (unlike Amnesia: Justine, who only gets one chance like the rest of us).
  • Should Daniel idiotically fall down the well in the Nave, he respawns, but it intentionally traps him in a sealed room, then releases him, asserting ownership again.
  • In the revenge ending castle Brennenburg collapses once Daniel leaves and not before. The Shadow was waiting for him to get to a safe distance, and a strange red aura is visible around Daniel as he walks back out through the castle. The guardian was and still is following him, but can Daniel accept this fate?

Daniel and Justine are in a game all along.
This is one way to prove if they can be redeemed.

The next game Daniel and Justine will face off against each other.
They'll have an amnesia-off. Justine will have used her resources to find out about Daniel's troubles, initially her interest was piqued by his letters, and ends up either capturing him and putting them both in one of her traps, or tries to find something similar to the orb, which Daniel delays by egging on her competitive side.
  • Jossed. A Machine for Pigs is actually an indirect sequel set several decades after The Dark Descent and doesn't involve any of the original characters.

Daniel had the Amnesia Potion forced into him long before the start of the game.
This was so The Baron would have another torturer with him. What Daniel was before he had a potion forced into him? He was Jowee from Drawn to Life. His Heel Realization came when he started getting his memories back. Maybe sometime after the game, he got all his memories back (and his sanity with it).

Daniel can't pick up the candles he lights because Alexander had his servants glue all of the candles to the table.
Why? I have no idea. But that would explain why Daniel can't pick them up when his lantern runs out of oil.
  • If he really needed that light, he could have picked up the entire table, but apparently, it's nailed to the floor too.

Daniel has telekinesis
The only time we ever see his hands are when he holds the lantern.
  • He only has one hand, apparently

The plot of the game is loosely based on H.P. Lovecraft's The Case of Charles Dexter Ward
Oh, there's plenty enough of differences to avoid being a ripoff, but the amount of similarities is still strong. A young, aspiring occultist seeks council from an older mystic who is decidedly more amoral and not quite human, who manipulates the younger man to become an accomplice in acts he never thought himself capable of. A massive underground tunnel complex where undead people are tortured for information, as well as monstrous guards made from dead humans are also present. The visit to another necromancer who lives in an old European castle is also mentioned in the book, as well as the possibility to travel beyond the boundaries of this world and summoning inhuman forces from the same place.

The rose petals falling signify Daniel regaining his memory
Each time the player sees the rose petals in the game, something damning or incredibly important happens to Daniel. The first instance is the note Daniel writes to himself. The other instance comes much later in the game when the player has their second interactive flashback in game, where Daniel is performing a ritual and chanting his madness mantra.

Pre-amnesia Daniel never expected to make it to Alexander.
Daniel more or less became a Death Seeker after he learned the truth about his victims, but he either couldn't get up the nerve to kill himself, or felt that it wouldn't make up for his crimes. A compromise was the mind-wipe, which freed him from his feelings of guilt, and enabled him to go on the fool's errand of killing Alexander. Past Daniel fully expected Present Daniel to die horribly on his quest, as atonement for his crimes. Past Daniel must have thought that even death at the hands of Mr. Face or Mr. Tall would be preferably to living with the knowledge that he himself became a monster.

Alexander is Nergal.
Both of them are centuries-old bad guys, harvesting some kind of life-force through violent means. Their reasons for doing so are also similar (Blazing Sword spoilers in Nergal's case) : Alexander wants to reunite with his "love", and so does Nergal (though he has forgotten that). Going by this logic, Agrippa is the unlucky counterpart of Athos.

Justine should be worried about those prisoners escaping.
If you take the best ending of Justine as canon, since it is the 100% completed ending then Justine is probably screwed. There are three prisoners that she captured that are capable enough to free themselves from their shackles after you "save them". There's one door blocked by a beam preventing their escape. Do you really think they couldn't escape? There's plenty of food and water in the dungeons to keep them going (the potatoes). Two of the "monsters" aren't crazy and only want to kill Justine which is plenty of reason to help the prisoners escape. One problem would be dealing with Malo who is blind, slow, hungry, and slowly being suffocated by his torture device. I'm pretty sure the prisoners can take him. The other problem is Alois who still loves Justine, but it might be possible to convince him to help. There plenty of tools the prisoners can use to make a battering ram of sorts or to dislodge rocks next to the door to create their own exit. Plus, the servants might get suspicious when they hear six men screaming in the basement. The police could easily found out that three of the six missing men dated Justine even if they didn't have DNA or any of our modern technology today. There is already suspicion that Justine kidnapped Alois. The three prisoners are in the same neighborhood as the women who probably kidnapped her three lovers. It might make people suspicious that she procured chemicals that are meant to knock people out. I know there are stories of people in that time period that got away with murders, but I don't think many of them had such damning evidence against them. It doesn’t help that Alois and Malo are semi-famous as a racquet ball player and as musician respectively. Plus, many of those murderers moved constantly and, thus, were hard to track down. On top of all of it, she isn't a baron like Alexander, and thus she couldn't even give the excuse that the men screaming in her basement were supposed to be imprisoned. Yeah, I'm 75% sure that Justine is screwed and is going to be caught.
  • Perhaps that is the point? The fear of being caught keeps the 'game' interesting for her? Considering all the effort she went through for that one little 'adventure', it wouldn't surprise me if that was the case.

The Suitors aren't really talking, Justine is just hallucinating their voices.
Granted, it doesn't make much sense, but it would explain why their lips do not move while they talk, why they can talk while gasping for air, and also the weird warping sound effect surrounding their voices. Well, the first two can be explained away by programming, but given that the prisoners talk fairly normally, the latter is especially weird...

Daniel will act as a Spirit Advisor to the sequel's protagonist.
It will go by the most interesting ending option, that Agrippa and Weyer helped him to ascend to the other plane of existence. But he still keeps some kind of connection to our world, and communicates through some kind of portal or otherworldly artifacts to help the new protagonist, who will be a relative of his, or otherwise connected to him in some manner. Basically, Daniel will be the Agrippa of the new game.

The Shadow is the Grue.
Like the Grue, it's an Eldritch Abomination that apparently lurks in total darkness where it devours its prey. And besides the residue it leaves behind, you never actually get to see what it looks like, just like the Grue.

Alexander is a Time Lord.
Centuries before the events of Amnesia take place, Alexander's TARDIS crashed landed on Earth. (In Prussia to be exact.) His TARDIS was damaged beyond repair and spent centuries trying to rebuild it. Daniel's orb was a key element that he needed to complete it and be able to return to Gallifrey and reunite with his lover. The orb chamber where Daniel and Alexander have their final standoff is the control room to Alexander's TARDIS which is disguised as a chamber in Brennenburg.
  • If that were true, why isn't Daniel brought with Alexander rather than left behind? Is it an old-model TARDIS that has to be rebuilt from scratch and blueprints every time a Time Lord needs to relocate?

Past traumas at and around the Castle Brennenburg will cause the area in and around Castle Brennenburg to become a Genius Loci
Much like with Silent Hill, the "energy" of the area will start luring particular people. With all of the magic and torture that has occurred here, visitors will be taking on bizarre "trips", facing their worst nightmares incarnate.

In "The Dark Descent", the monsters are manifestations of Daniel's psyche.
The theory has some holes in it, some truth in the fiction and some fiction in the truth you could say. Daniel hates Alexander for making him a "monster", and one of the prisoners calls Daniel a Brute, one of the zombies that appear late-game. However, there is some reality to the encounters with the monsters, as Alexander has his servants capture Daniel at one point to protect the Inner Sanctum. However, the servants never bother to make Daniel dead, or even put in a token effort to prevent his escape from the cells. Perhaps Alexander teleports Daniel to the cells with his power as a last-ditch effort, but can't do it again because the portal ritual must continue uninterrupted. Which leaves the question of how Daniel just gets back up after "dying" to a servant. Was it a bad trip that caused Daniel to pass out from horror, the shadow?
  • The servant Grunt represents the tortured victims of Daniel, desiring revenge against him and representing Daniel's desire to receive retribution for what he has done. Early on, residual memories or screams start to bleed through, and the grunts start manifesting. Daniel does have a journal entry about the helpers of Alexander, but the entry is rather vague on description. Some of the grunts are actually unable to attack Daniel, and will simply phase out if approached, suggesting hallucinations. The "real" grunts can also walk into dead-ends and simply vanish like they were not there.
  • The Brute is likely Daniel Himself, representing what he has become, just as the prisoner said to Daniel. It could be Amnesia's version of Pyramid Head, representing Daniel's wish to be punished/executed. It is also useless to run away from a Brute because they can outrun you, much like Daniel can't undo his murders. The "Great Knife" on the Brute's arm is also similar to another Great Knife.
    • The developers commentary does mention Silent Hill was an inspiration,for the Choir room if nothing else.
  • The Brute also makes offensive appearances once Daniel finds the corpse in the morgue. Possibly an indication that this was one of Daniel's murders. After the medical procedures to inoculate against the poison fungus, the avatar of Daniel makes a violent entrance.
    • Perhaps the Kaernk represents Alexander? You only see Alexander at the end and never see his normal human appearance outside of paintings, like how you never get a look at the Kaernk. Both are creatures from another dimension and both are stuck in this world living out there time by preying on living things. The Kaernk is also categorically different than the Gatherers, similarly to how Alexander is categorically different from Daniel and the prisoners.
    • This could also work if you have Daniel represent the Kaernk and Alexander the Brute. There is a lot of overlap between Alexander and Daniel in character, so it wouldn't be a stretch to say either could represent the Brute. As for the Kaernk, both the Kaernk and Daniel are never seem by the player and have placeholder models (Daniel is an arm and the Kaernk is a sphere). Both prey on living things to survive in some manner. The Kaernk are generally trapped underground, in places like the Wine Cellar and Wells. Daniel was trapped in an Algeria deep in an underground tomb.
    • Perhaps the Shadow then would be Agrippa and/or Weyer? If the theories on this page about the Shadow hold water, than despite it's scary appearance it is really trying to help you like Agrippa. Agrippa gives you advice, the Shadow forces you to keep moving and at times opens up new areas (including ones needed to help Agrippa!).
  • During the "Revenge" ending, Daniel even states that game was his purgatory, to atone for his crimes.

Based on the Developers Commentary, the Servant Brute is Amnesia's Pyramid Head.
Like the previous WMG above. The developers mention inspiration from Silent Hill. The Brute mimics Daniel by horrifying prisoners in the Prison (hurry to an unbreakable door to look through a window and see it.) The Brute's weapon is also as deadly as Pyramid Heads'.

The Brute shows up personally for the final third of the game, but makes audio appearances in the first hub. Silent Hill 2 also has a Laser-Guided Amnesia plot that is essential to its story.

Oswald Mandus is Daniel's indirect relative.
Daniel probably never had kids or displayed romantic interest in anyone (if he had, it would have most likely been mentioned in his journals), so he couldn't have had a direct descendant. However, Dummied Out information says he had a sister named Hazel, and it's possible she had children and had Oswald as a direct descendant. Or any other siblings Daniel had.