First off! The titular Lyle! Going to try to keep this section limited to what we can learn about Lyle through his apartment rather than just thoughts about Lyle himself, as he is possibly the single most-discussed character in the whole game. And we can infer a lot!

Jeanne’s dialogue confirms that apartment 21 is actually Lyle’s apartment, seeing as she does consider him her neighbor. It’s not a situation where Lyle moved into someone else’s abandoned apartment after the apocalypse started.

The D&D M&W stuff makes it clear that Lyle’s a fan of tabletop games! Do you suppose he’s part of an ongoing group, or is he looking for people to play with? It can be so hard to find a local playgroup! I like to think he and Edwin had a group going, maybe with a few other astronomers involved.

Considering we get the crossword book from him but also that it’s completely unstarted, I assume that it’s one of those things that’s he’s been meaning to get around to but never quite found the time (been there, buddy).

We can find anxiety meds in Lyle’s bathroom! Which is a minor if interesting detail. Lyle really does get more and more relatable.

Funnily enough, one thing that we don’t see in his apartment that we should be in there is the zoom lens that Edwin’s loan log says Lyle is currently borrowing! But considering his partly mechanical form, it’s possible that the zoom lens is simply part of his body now.

Lyle’s dark room! I’d wager Mr. Henderson wouldn’t exactly approve if it’s existence if he were to ever find out. This strikes me as something that breaks some kind of agreement found in you average renter’s agreement.

Notably you can only ever access the dark room if you kill Lyle to get the key! He doesn’t grant you entry under any circumstance, and it’s not exactly hard to see why considering what his ‘special project’ is.

On that note, Lyle will never attack you! It is impossible to get him to be the one to instigate a fight, you have to attack him out of the blue.

The photos of Sam make it clear that Lyle’s affection for Sam isn’t a new development by any means.

More concerningly, though, is the key you can find between two of the bookshelves. It’s SAM’S apartment key, which the more eagle-eyed and elephant-memoried of you out there will recall is the spare that’s missing from the plant outside Sam’s apartment! It’s dubious as to whether or not Lyle has ever used the key.

As far as I’m aware, the key has no actual purpose other than to serve as an ominous reminder of Lyle’s obsession.

What the fuck is Lokjaw’s deal. Seriously. Lyle. Why do you have a man in your unlocked closet? I can excuse the hamburger man you have locked in your bedroom (we’ll get to him), but this is just ridiculous.

My thought on why Lokjaw hasn’t just left the (completely unlocked) closet is because their mental state has deteriorated to the point where they cannot operate a door. Maybe they don’t even recognize that a door is a thing that leads to another place anymore.

But that’s assuming Lokjaw was ever human to begin with! I’ve seen theories that they were Lyle’s dog (credit to @crankyteapot once more), which would explain the mutant’s posture, strange lower jaw, and why they’re in Lyle’s closet in the first place!

But considering that there’s no dog bowl, no collar, and no reaction from Lyle if you kill Lokjaw? I’d wager that if they are a dog, they’re not Lyle’s dog, but rather just some random already-mutated dog he came across! It went sniffing around the closet and Lyle just shut the door behind it. This making it a problem for future Lyle.

Lokjaw does drop raw pork if you kill it, which is… hmm. Something.

I… don’t think there’s any pleasant explanation as to why it drops raw pork actually.

Something about Lokjaw, whether human or canine, makes me think they had a very nervous disposition. There’s something so defensive about their posture, and their facial expression seems so scared! Unfortunately for us, this translates to the mindset of ‘kill the thing that is scaring me’.

Unfortunately, the reason for Tumorhead’s presence in apartment 21 isn’t any clearer than Lokjaw’s! If anything it’s stranger because he’s in what appears to be Lyle’s bedroom, and he’s even locked in there by those strange fleshy growths.

On thing IS clear: the hamburger found around the room is pretty clearly implied to be meat that’s fallen off of a Tumorhead himself, judging by what happens in battle. Sam is the bravest man alive for taking this meat and cooking it.

@crankyteapot pointed out a few visual similarities between Tumorhead’s clothing and the Onlookers, and I could see there being a connection!

I really love the idea that Tumorhead, having looked outside but while still human, stumbled drunk into Lyle’s apartment and collapsed into his bed (with Lyle being too timid to correct them). The poor guy nursing a splitting headache that manifested very viscerally as his metamorphosis completed in his sleep.

Located in Lyle’s bathroom, we finally have an easy-to-explain mutant presence! The broken-down door makes it pretty clear that this guy forced his way in from F1 through Lyle’s shortcut.

Since this guy is pretty clearly implied to be from F1, I wonder if he has any association with that one gigantic eye in the unnumbered rooms? On one hand there’s some surface level similarities, but on the other hand Eyecluster’s eyes are functionally distinct: they’ve been modified into acid-launchers and it’s unclear if he can still see out of any of them!

My favorite detail is how Eyecluster’s posture seems off balance from the sheer volume of eyes he has, it’s a neat touch that conveys just how ungainly their newly added parts are! And I adore how the Visitor’s effects clearly don’t care about what an organ USED TO do. Your eyeballs spit acid now. Your hair can eat things. Your tongue is easier to get around on than your legs.

This is nothing but pure headcanon, but I like to think that on the morning Eyecluster beheld the Visitor, he woke up wearing contact lenses that he’d left on overnight by mistake. The unpleasant sensation in his eyes ended up heavily influencing the results of his transformation.

It’s what you all came here for, it’s LYLE BATHTUB THEORY TIME!!

So. Lyle’s bathtub. It’s weirdly long, right? And that’s not just sprite perspective weirdness! The comically long bathtub has actual inspection dialogue that reads ‘huh this thing is long as hell, weird huh?’ and it also points out that the whole room looks stretched. Sure enough, the less conspicuous but still very conspicuous counter across from it is also weirdly long!

But why? I’ll tell you why. I think Leigh stretched Lyle’s bathtub. it’s not what’s INSIDE the bathroom, but rather OUTSIDE!

The other side of the south bathroom wall is the hallway where Leigh chases you. You know, the hallway that she supernaturally lengthened so she could have more fun chasing Sam. Not only that, but this chase is required in order to access Lyle’s apartment in the first place, you cannot access Lyle’s bathroom without having done the Leigh chase!

So Leigh’s space-warping chase tunnel seems to have had some lasting effects on the adjoining rooms! Which makes sense. Sure, Leigh has some kinda of vague elongating powers, but you can’t tell me she knows how they work or how to use them in a way that doesn’t have some lingering effects.