Difficulty Spike: After reaching the 'monster' symbol on the map, the game gets a lot harder. Not only do you get a lifebar of sorts, but the game throws in enemies that are faster and can follow you down and up the stairs. On top of that, the forest gets populated with (unmoving) monsters and throws a time limit at you.
Nightmare Fuel: The game, even though it's not very violent, is still terribly scary with the ghosts being pure Body Horror, and the complete Paranoia Fuel going around the house during the survival segments. And the fact that you simply don't know what's going on.
Nightmare Retardant: Some of the ghosts aren't really that scary, most of them are just boxes or bushes with legs.
Paranoia Fuel: The survival segments provide plenty of this. For example: It should be noted that Guests can be only seen in dark rooms but can move through the lit ones without breaking the lights until they 'materialize'. So if you keep all of the lights lit, a Guest can appear basically out of nowhere at any time and you can't see him coming.
The Woobie: There's a group of fans that feel sorry for the Lodger, which is rather understable considering how he's paranoid on his own home and has developed sleep problems. There's also the fact the diary and his monologues hint that there's a story of misery attached to him and the house itself. Just to make a point, one of his dialogues mentions he has a recurring nightmare of losing someone or something.
Alternate Character Interpretation: Bel. Is she an Ax-Crazy sadist like Genesis, or a damaged person going along with it? When she roleplayed as a molested child was she trying to mess with Evan's head, or was she acting out a childhood trauma?
In the alternate ending, is Evan going to save the next victim and prove his innocence, or put a more permanent ending to the girls' rampage.
Eli Roth's commentary on the alternate ending describes the girls as having "switched roles." However, Bel is still the one getting up close and intimate with the new victim, and Genesis is still the one standing back and talking, exactly the same dynamic they had with Evan.
Crosses the Line Twice: A lot of scenes that would be considered horrifying in a different film wind up being hilarious in this one. Evan's fate at the end buried up to his neck in the backyard with a gag in his mouth and his phone showing a certain video of him going viral is especially funny.
Fridge Horror: Bel and Genesis get away with ruining Evan's life...except they were sloppy enough to leave evidence all over the place that there had been a break-in, and Evan could easily say he'd been coerced into sex with them. But...exactly how many girls out there are legally named "Bel" or "Genesis"? Most likely, they'd used aliases to cover their tracks.
Eh, facial recognition technology could most likely sort everything out when the police inevitably get involved.
The alternate ending shows that they've been wearing wigs, as they swapped them when they moved onto their newest victim.
Check out Evan in the alternate ending. His hair has grown back and his beard is longer. He's been tracking these girls for awhile, but that would imply that he's suddenly got a lot of free time on his hands. Odds are his wife found out about the sex and kicked him out of the house, which will make his revenge even stronger.
Ham and Cheese: Keanu Reeves's performance whenever he's meant to be anything other than calm or cheerful. In his defense, at least he's not saying "whoa".
All the more appropriate that he compares a 2-girl blowjob to "free pizza".
Narm: Some of the movies' quotes are regarded as this, most notably "Chocolate with sprinkles" and Evan's "The Reason You Suck" Speech to the girls.
IT WAS FREE FUCKING PIZZA!
There's Evan's Skyward Scream, which he delivers while gagged. Given that it's Keanu Reeves, you almost expect him to fire a gun in the air, except he's buried up to his neck.
Narm Charm: What ultimately draws audiences in. Eli Roth, Keanu Reeves and a plot that combines Fatal Attraction with Funny Games ultimately forms a thriller that gets more laughs than gasps.
Paranoia Fuel: Imagine leaving the house for the weekend, only to come home and find every square inch of it has been either vandalised or wrecked beyond repair.
The Woobie: Louis, the art dealer who comes to collect Mrs. Webber's latest sculpture only to run afoul of the girls. Once they realize he's not going to fall for their charms, they steal his inhaler and toss it back and forth while he chases after it, getting closer and closer to an asthmatic attack. He then slips and hits his head on a sculpture, snapping his neck. Bel and Genesis then dump his body.
Stoic Woobie: Evan can do nothing but watch as Bel and Genesis destroy his home. Any time he tries to get help, he only makes them angrier.
