Nancy Drew (video game)/WMG

Curse of Blackmoor Manor VG was written/programed entire by American wizards
its an explation for the below:

"For one thing, Essex does not have moors. Fens (wet-lands), yes; moors, no. Therefore, the house should be Blackfen Manor. Worse, Penvellyn is not an Essex name - especially not one that would have survived from the 14th century. This story belongs in Devon or Cornwall - on Exmoor or Dartmoor! Where they have moors, dark manors, rumours of beasts, and ancient families with names like Penvellyn!"

Nancy is being reincarnated by Hanyuu in the Second Chance scenarios.
Every time Nancy dies or gets fired, Hanyuu intervenes by taking Nancy back in time to just before she made her mistake so she can solve the mystery. Her reason for doing this is because solving the cases somehow relates to the fate of Hinamizawa and if the cases go unsolved and the villain succeeds, everything goes to hell and she'll have to go through the tiring process of taking  back in time yet again.

Bess, George, and Ned are psychic.
And that is how they always somehow know what Nancy is supposed to do next, but they are given very limited visions of the future, hence they cannot tell Nancy what to do afterwards unless Nancy asks them, in which case they have a vision. However, their powers are limited; sometimes, the visions they see are either blurry, or their psychic powers just don't work all the time, which is why there are times where they say, "I wish I could help, but I think you know what to do". And in later games, their powers cease all together, which is why Nancy ultimately has to seek other sources for hints.
 * Ned seems to have gotten his powers back recently, though, if Warnings at Waverly Academy are any indication.

Curse of Blackmoor Manor: Linda really was turning into a werewolf.
Jane knew this all along and she only claimed to have been responsible for making Linda think she was turning into a werewolf because she didn't think Nancy would actually believe her if she told the truth. Of course, this also means that by the time Nancy leaves, Linda will be a full-fledged werewolf...

Curse of Blackmoor Manor: Jane is immortal.
And that is why she never dies no matter how much time you waste. She only pretended to be running out of air just to make Nancy feel guilty, and also because she didn't want to spend all of eternity trapped in a box.
 * Alternately, Jane is secretly claustrophobic, and only felt as if she was suffocating because she was trapped. The box actually contains enough air for her to survive for hours, and it probably isn't airtight anyway, because the floor it's sitting on is uneven.

Warnings at Waverly Academy: Izzy is related to Lillian Weiss from Stay Tuned For Danger.
The two share a strong resemblence in both looks and personality, for one matter. There is also the fact that Izzy is from New York. Thus, it can concluded that Izzy is either Lillian's niece (assuming she has an untold-of sister), or her daughter. If you choose to go by real time, ie, the time the games were released, she would've been around seven or eight during the events of STFD; if you choose to narrow the timeline even further, she would've been around ten or eleven--in either case, it contains the Unfortunate Implications that Lillian had Izzy in her teen years, married the father, and divorced him before she met Rick, as she looks to be in her late twenties in STFD. If this is the case, it explains a LOT about Izzy's behaviour.

The culprit in Ransom of the Seven Ships will return for the final game.
How can we be certain that he really did  He may have another plan up his sleeve where   He may very well return for the final game to
 * Or how about ALL past culprits work together in a world wide mystery that brings back all of the fan favorites and an actual appearance of Sonny and Prudence!
 * That would be AWESOME! Of course, it would ruin the whole ambiguity about what they look like, but still.
 * Look,  is nuts. He would kill the damn shark and he would swim away if it meant he could kill Nancy another day.

Nancy Drew is a Time Lord.

 * This Troper saw this and realized that yes, it was inevitable.

The last couple of games have been building up to something amazing in the series.

 * Think about it. In "Ransom of the Seven Ships" we get to see Bess and George's faces and  Then in "Trail of the Twister" there is specific continuity, where P.G. Krolmeister gives Nancy a trip to Japan for solving the case. During the Japan case, Nancy hears of a castle in Germany that scared off a ghost expert (leading to the expert quitting her job). The next game is going to take place in a castle in Germany. Tell me that there's not something suspicious going on. Just tell me.

The entire series was written as a celebration of female masturbation.
Bobbie Ann Mason pointed out in The Girl Sleuth: A Feminist Guide that it's more than a bit odd how often Nancy is given a chance to stick her fingers in a dark hole and say something like, "There's a tiny knob in here! I've found a secret compartment!"

P.G. Krolmeister is a Brain In a Jar.
It would certainly explain how a man who has documentedly lived for over 200 years is able to have such an energetic voice and demeanour by the time Trail of the Twister happens. Someone who has practically dominated the world market for such a long time would certainly have the time and resources to research ways to prolong his own life to ludicrous lengths. In the present day, he also has a fully automated system that allows him to keep his original voice as well as either control precision machinery that lets him keep designing inventions, or ways to communicate his ideas to select assistants.

Alternatively...

P.G. Krolmeister is a Legacy Character.
The title is held either by a chosen successor or a descendant who has a similarly insane intellect and knack for inventions.