Do you want your own harem? How about in another world for some reason?
Upon dying you are greeted by Voluptas, Goddess of Lust, and give the power of size control.
You use this power in the only possible way, to change the breast size of any girl you're intimate with.​

A Survival Horror Game of Temptation and Transformation
The world has fallen to the RAG-Virus—a pandemic causing rapid weight gain and mental decline. You're Sarah, alone in your apartment as Visitors knock each night. Some are survivors. Others are something far worse. Every choice determines if you survive or become their next mindless vessel.​

Features:
Visitor Testing System: Check hands and teeth—some aren't human
Weight Gain Progression: Watch Sarah physically transform as the virus takes hold
8 Unique Visitors: Each with their own dark desires and secrets
Multiple Endings: Survive, escape, or embrace transformation
Psychological Horror: The seductive pull of giving in
Content Includes:
Female MC transformation
BBW/SSBBW weight gain
Breast and ass expansion
Horror and psychological tension
Adult themes (18+)

From the Developer
"Don't Open the Door explores the intersection of fear and desire. What happens when the thing that terrifies you also tempts you? When survival means resisting pleasures that promise to erase all your pain? This game is about that moment of choice—when the knocking starts, and you have to decide who to let in."

Game feels like finding some forgotten Flash porn game on a sketchy site, just cleaner and with way more obsession over boobs growing pixel by pixel. You’re basically sitting behind this girl’s eyes while her whole life turns sideways because of one weird little shop that looks like it spawned out of a cheap JRPG. She’s a regular student, stressed about exams, roommate drama, boring campus stuff, and underneath it all she’s horny and insecure in a way that’s way too real. At first she’s just curious about changing herself a bit, like “what if my tits were a size bigger, no big deal”. Then you start mixing these shady potions and suddenly her bra is fighting for its life and her ass is spilling over the chair while she’s still pretending everything is normal. The story really leans into that slow “oh shit, I can’t button this shirt anymore” spiral. Most of the heat is in those quiet moments when she’s alone in her room, squeezing herself in front of the mirror, sliding her fingers under fabric that obviously does not fit anymore, pretending she’s just checking progress when she’s actually getting soaked and flustered about what she’s turning into.

What I liked is how horny the writing is without shouting at you every line. When she walks back from the shop and feels her panties riding higher because her ass quietly grew on the way, it’s written like she’s confused and turned on at the same time. She’s trying to sit like normal in the classroom while her bra digs into her ribs, her nipples hard as hell under a thin top, and everybody else is just talking about homework. Those classroom scenes are more erotic than some actual sex CGs I’ve seen in other titles. The game lets you screw around with potions and pacing, so you can go greedy and push her into big, heavy curves stupid fast or just slowly stack “little changes” until she suddenly realizes her whole center of gravity is different. One time I messed up a mix and her ass jumped a size mid cutscene and she almost knocked over a chair backing up, then pretended she meant to do that. That tiny stumble sold it harder than any magic sparkle effect. The sex itself is more about her being overwhelmed by her own body. She’s touching, grinding, trying to find a position where her new curves don’t get in the way, failing, then giving up and using that as fuel. When she lies on her back and her tits slide to the sides and she freaks out because they weren’t big enough to do that before, that’s the kind of detail that sticks in your head when you close the tab. I wish the sound had just a bit more weight to it, like heavier breathing or some fabric straining noises, but the silence almost helps, like you’re right there in her room, hearing only clicking and her thoughts getting more and more filthy.

Gwen’s story feels like someone smashed together a horny growth fantasy, a clumsy isekai, and a half-finished audio drama, then fed it through one of those AI image models that sometimes makes six fingers on one hand and tits that look like they’re about to file a worker’s union. She starts out pretty normal in the intro, just this curious girl with a bit of attitude, and then the game goes “hey, wanna be futa?” and casually hands you a massive cock like it’s no big deal. I liked that it doesn’t treat that choice like a big moral thing, just a horny setting. You pick, and then the whole tone of the scenes kind of tilts around it, especially in the later encounters where her body starts getting… yeah, really not safe to show on Twitch. The first time the weight gain actually kicks in, it doesn’t come with a big fireworks moment, it’s just some teasing comments, tighter clothes, a CG where her belly and boobs look a bit fuller, and suddenly you realize the game is already steering you down the “bigger in every possible way” slope. It’s sneaky like that. Sexy sneaky. And also a bit stupid, in a charming way.

The visual novel structure is pretty straightforward, but the way the scenes are written has this funny clash going on. You get sweet, curious Gwen asking stuff like she’s trying to learn about the world, then two clicks later she’s moaning about how heavy her tits are, how good it feels when they swell and press against her own arms, or when her growing muscles make her clothes ride up and half the screen is just flexing thighs and bulging pecs. Some of the AI art is actually hot as hell, like those shots where her muscles and curves grow together, thick arms holding up breasts that look too big for her frame, nipples erect and pushing shadows across her chest. Other times her face looks like she remembers she’s an AI render and wants to cry about it. It’s inconsistent, yeah, but that almost weirdly fits the whole “growth chaos” thing. One scene narrows in on her biceps a lot, like the artist had a fetish tunnel vision: veins, sweat, that slight shake when she flexes and realizes she likes feeling stronger and heavier and more stuffed everywhere. Then next scene it’s all about her ass and hips gaining weight, her panties digging in, and the writing just goes straight into, “I can feel my underwear cutting into my skin while my cock throbs against my belly.” That line got stuck in my head for a while, probably because I kept rereading it to hear how I’d deliver it out loud in a recording.

From a voice acting nerd brain, this game is a goldmine of “oh god, I want to read this out loud” lines and also “who wrote this at 2 glasses of wine in?” ones. Gwen switches between playful and desperate so fast. One moment she’s teasing someone about watching her grow, asking if they’re scared of a girl with bigger arms than theirs, next moment she’s in this messy, breathy state, describing how her tits are swelling against somebody’s hands, how heavy they feel, how her cock pulses each time her chest expands. There’s a scene where she’s talking about how her boobs are starting to block her view of her feet while she walks, and the text spends an absurd amount of time on how her bra straps dig into her shoulders, the fabric creaking, that pressure right before it gives in. I kept thinking, “this is exactly the kind of thing guys on Reddit argue about for six pages.” The game lets you pick options that either encourage her to lean into the muscle side of her growth, with her arms and abs thickening, or the weight gain side, where she goes soft but huge, with belly and boobs that jiggle so much you can almost hear the sound in your head. Sometimes it feels like the pacing forgets what it was doing, you go from a hot futa scene where she’s grinding her thick thighs together and complaining how her cock keeps getting in the way, to a filler conversation with a cameo character from another universe that feels like the writer just wanted to name drop. Still, there’s this one late event where everything clicks: Gwen’s taller, wider, chest stretched tight, veins on her biceps, her shaft leaking over a softened, heavier belly, and she’s half laughing, half moaning about how she finally feels like the “biggest version of herself” while begging you to keep making her grow. That scene alone made the whole messy, horny, AI-generated ride feel worth it in its own broken, overstuffed way.

You start as this small-town girl who suddenly lands in a big city for university, and the game just quietly goes, “yeah, you’re thirsty for knowledge, but also… you’re gonna feed some really bad habits.” It plays like a cute anime dating sim at first, all soft colors and shy smiles, but it’s absolutely not shy about what it actually wants to do with bodies. Every girl you meet has her own hang-ups, and almost all of them can be pushed toward getting softer, heavier, more stuffed, more… overflowing. It’s like someone took a wholesome campus slice-of-life and then asked, “ok but what if everyone slowly turned into walking curves because they can’t say no to dessert or late-night snacks or one more drink with whipped cream?” and nobody said no.

What I liked is how the weight gain and all the expanding parts aren’t just “you clicked, her boobs get bigger, congrats.” It kind of sneaks up. You’re on some normal date at a café, she orders something modest, you tease a bit, suggest the giant milkshake, then a second one, then some cake “since we’re already here,” and the dialogue starts getting this hungry tone. She blushes, complains she’s full, but her eyes light up when you suggest bringing takeout too. You come back for another event and suddenly the sprite has thicker thighs, her ass is straining her skirt, she’s tugging at her top because her tits don’t sit right anymore, and the text is like, “I don’t know why my clothes feel tight, it’s probably the laundry.” Sure. Then you hit the scenes where you deliberately stuff her until she groans and presses her hands into a round belly, and the game just leans into it. Not joking around. Belly bulges, shirts riding up, bras digging in, the whole thing. Sometimes it goes pretty far, girl pinned in her chair by her own ass, panting, still licking cream from her lips, asking if there’s more. The stuffing focus is strong, and it actually feels erotic instead of goofy, which is dangerous if that’s your thing. Breasts swelling out of a top mid-conversation, buttons popping, jiggling every time the text box advances, that kind of “oh shit this is escalating fast” feeling.

What bugged me a bit: the pacing is weird in spots. You get these long streaks where you’re clicking through campus small talk, class stuff, background drama, and you think “ok maybe this is just a normal VN with some chubby fanservice,” and then suddenly a single choice turns the scene into full-on gluttony porn with her moaning around a spoon and talking with her mouth full. No real ramp. I kinda love that and hate it. Also one character’s pants look like they’re painted on when she starts getting really thick around the hips, but then the next CG, the proportions hit just right and you forget you were annoyed. The writing has that slightly awkward, non-native vibe sometimes, like someone typed “I feel my body more heavy now” and forgot to fix it, which low-key makes it hotter because it feels less polished and more like a fetish passion project. There are a few routes where the expansion focuses more on hips and ass, and you watch her go from cute in jeans to basically one big ass with a girl attached, knocking stuff over in her dorm with her butt and pretending it’s an accident. Meanwhile you are absolutely pushing her there with “oh come on, have another plate, you worked so hard today” while your character’s inner monologue is like, “I want to see that zipper surrender.” It does that thing where the MC acts supportive and sweet but the choices are all like: encourage, really encourage, or absolutely ruin her self-control. And the game smiles at you and hands you another scene where she waddles a bit heavier, breathing harder, but saying she’s never felt so “free.”

Hotel harem setting always sounds kinda cheap in my head, like porn from old torrent days, but here it actually feels cozy and weird at same time. You show up, get this half-broken hotel from grandpa, and pretty fast it turns into your personal corruption playground. It starts slow, like a dating sim where you grind money, talk to girls, learn their habits, but the longer you stay, the more the place feels like a cage where everybody slowly forgets where the line used to be. One moment you just check the maid’s stats and buy her a cute outfit, and few in-game days later you’re attaching nipple clothespins while she thanks you for “training” her better. The jump from wholesome to holy shit is honestly the main charm for me. It doesn’t slam you with nonstop porn; it lets you work for it, tease it out of the characters, which makes the first time an innocent girl starts masturbating on camera just to help pay her rent hit a lot harder. For a game about boobs, it’s weirdly good at pacing tension.

The girls themselves are a whole mess in a good way. You’ve got the elf maid who arrives already broken in spirit, treated like a slave for centuries, and the game leans into that dynamic hard. At first you’re just trying not to be as awful as the world around her, then you catch yourself enjoying how obedient she’s become, and suddenly that “maid sim” loop of chores, rewards and punishments feels a bit too arousing. There’s the ultra-religious virgin walking around with a body that screams “fuck me” while her brain screams “you’re going to hell”, and watching her go from blushing when you grope her a little, to shaking and squirting all over the sheets while begging you to creampie her, is such a slow-burn corruption that I actually felt kinda proud of myself. In a fucked up way. Same with the yandere tendencies on one of the girls: at first it’s cute jealousy, then she’s basically edging herself for you, waiting for permission to cum, and you realise the game quietly slid into orgasm denial and hardcore devotion territory without big fanfare. That’s what I liked the most, I think. It doesn’t pop a huge banner saying “now you unlocked BDSM”. You just try one spanking scene, then another, then you’re fastening her collar before breakfast like it’s nothing. Of course, some routes drag too long, and the grind for money or affection kills the mood when you just want to pin someone to the bed and rail her ass. Also the mobile feel of the UI gets a bit annoying on desktop, especially when you’re trying to quickly jump between girls for late-night spying and end up tapping the wrong room like a dumbass. Still, when you’re standing in a corridor, peeking at a girl fingering herself in the shower, hearing little lines about how she “only thinks of you now”, and knowing you’re the one who turned a shy tenant into your personal toy, the whole messy, horny hotel starts to feel like home in the worst possible way.

I play this one on my lunch break at the office, switching between the game and Excel like a fucking ninja, and it actually feels kinda perfect for that. You start in this small bar, nothing fancy, nothing trying too hard, and there’s this girl at the counter who looks like the kind of cute you swear you saw on Reddit once at 3… ok, at night, never mind. She’s got that “I’m tired, something’s wrong, but I’m still hot” vibe. At first she’s just normal sized, normal body, normal everything, and the game doesn’t rush it. You talk, you flirt a bit, pick a line here, a stupid joke there, and it almost feels like a very scuffed dating app conversation, just with way more tits later. The fun part is how her body slowly starts changing while you keep coming back during the “weeks”. It sneaks up on you. One visit she’s a bit bustier, you’re like huh, ok, then next time you’re staring at your monitor thinking “there’s no way her shirt button is surviving this scene”. Then later her ass just says fuck physics and the dev acts like this is just casual. The good thing is they actually write her as a person, not just a pair of balloons with a face. She’s worried, a bit confused about what’s happening, cracks some jokes, gets flustered when you go a bit rough with the teasing. There’s a lot of horny humor, that “I’m not a slut... unless you ask right” type. Sometimes it hits, sometimes it’s cringe, which somehow makes it feel more real, like some guy trying too hard in a Discord server.

The build up to the lewd stuff is the best part and also kinda annoying. You’re clicking through these chats and bar scenes, watching her tits go from “nice” to “Jesus Christ, how do you sleep on those” and her ass keep inflating like someone forgot to turn off the pump. When the sex finally hits, it leans into that rough energy, grabbing, pressing her against things, her body bouncing everywhere like the dev is just screaming “more jiggle, more jiggle” in their head. Cumshots are messy in a good way, not shy at all. You get that moment where you’ve been teasing her for a while, then you finally pin her and just go all in, and she reacts like her whole oversized body was made to be used like that. It’s not subtle. You finish on her face, on those giant tits, on that swollen ass, and the game lingers just long enough for you to sit there pretending you’re “reading emails” while staring at a screen full of dripping curves. The funniest part is how barebones everything around that is. Interface feels like someone knocked it together while watching porn on the second monitor. Few choices, you kinda expect a deep system, but nah, it just gives you enough to feel like you’re poking her personality while her body goes crazy in the background. One time I misclicked a line while my boss walked past and she reacted all shy and horny at once, and I had to alt tab to Slack with this massive sweat going. Anyway, if you’re the kind of degenerate who likes watching a girl slowly turn into a walking titty-booty combo while you pretend to “get to know her”, just take it slow, don’t skip through the early chatter, and let each new curve surprise you like it’s your first fucked up bar crush.

Massive Hearts feels like somebody took a normal porn game idea, dropped it in a blender with a size queen fetish, then forgot to hit “smoothie”. The result is messy, wet, kinda ridiculous and somehow really hot when it clicks. You start as this regular dude, or futa if you want, and from the first scene you notice the camera really loves tits. Not just big boobs. The kind of breasts that look like they’re arguing with gravity and winning. The sound design surprised me first actually: the little breathy gasps, the heavy jiggle noises when a giant girl leans over the screen, that subtle sticky sound when she squeezes milk from herself during a titfuck. Sometimes the moans clip or repeat awkward, but when you’ve got a milf twice your height riding your cock until her tits literally swell bigger from arousal, it works. There’s this moment early where you’re pressed against a giantess’ chest, she pins you to a wall with pure boob, and the audio shifts to this muffled heartbeat and her slow breathing while she grinds you between her breasts and whispers like you’re tiny prey. That felt intimate and porn-y in a weird soft way, like ASMR for degenerates.

The pacing jumps all over the place. One scene it’s slow teasing, a girl shyly masturbating while watching another lesbian pair lick milk off each other’s nipples, almost romantic, and then suddenly you’re buried inside this hyper-sized futa with a cock longer than your torso, and she’s milking herself all over you while begging for a creampie. The game doesn’t care about “realistic”. You’re fucking girls way larger than you, and somehow your dick still matters. Some of the 3D models look great when the light hits curves just right, especially the creamy skin and the sheen on wet areola when they start lactating heavily, but then a hand clips through a thigh or an ass looks like it’s made from two different girls pasted together and my immersion just jumps out the window. Still, when that giant milf bends over and her giant ass fills basically your whole field of view, with little squishy sounds as she lowers onto you, it’s hard to stay mad. There’s this harem vibe that builds up quietly: you realize after a while that several of these towering women all want a piece of you. One is playful and uses her tits like a bed, letting you fuck her cleavage while she lazily strokes herself, milk leaking over your stomach; another is more dominant, picking you up one-handed and ramming you into her dripping pussy like you’re a living sex toy, then holding you in there while she clamps down and floods you with juices. I kept noticing small things like how the breathing changes right after you cum inside, or how the camera lingers on the cum drooling back out after a creampie, and then ignoring bigger things like actual emotional build-up. But ok, I didn’t come here for a Shakespeare milf. What threw me a bit was how fast the transformations happen: one girl goes from “big tits” to “are you sure this is still human” in basically one scene, breasts inflating, ass swelling, body stretching taller while you’re still inside her, and you feel like a plug trying to hold back an ocean. It’s absurd and also kinda thrilling, like hentai logic made interactive, even when the animations stutter or the faces sometimes look like they’re halfway through blinking during orgasm. Still, when the giantess leans in close after you fill her, tits swollen, milk dripping, and whispers that you’re hers now, and you know there are three more colossal women waiting their turn offscreen, it sticks in your head longer than it should.

Tifa locked up in some fucked up dairy lab is already a wild idea, but this game leans into it in a way that feels almost too specific, like the dev has been thinking about this for years while pretending to answer emails. You’re not just “milking” her, you’re basically doing cruel tit-physics experiments on her chest with a stupidly thin rope that looks like it came from a cheap hardware store, and somehow that makes it hotter. Her boobs are massive, heavy, shiny with that soft latex reflection, and then you start looping that string around them, tighter and tighter, and the game really wants you to stare and think, “yeah, they’re way too big, let’s see how far this goes.” I actually paused at one point just to rotate the camera a bit and watch how the skin dents where the rope cuts in. That tiny detail kind of owns my brain now and I’m annoyed about it.

The best part is how mean it feels without going full edgy nonsense. She’s tied up, arms trapped, torso locked, legs mostly useless, and she keeps squirming like she honestly believes she can pull away from you. Every time the rope bites deeper, she tenses, nipples twitch, and then that first spurt of milk hits and you get this messy, creamy arc that’s half hot, half “wow, this is actually kind of gross” which of course just makes it hotter again. The breast expansion stuff isn’t some magic “boobs suddenly +3 levels” jump, it creeps in slowly. You rub, squeeze, press, and after a while you notice her chest is just… taking over the screen. I liked how the milking pressure feels like a rhythm game without the game screaming it at you. You push it too far, she whimpers, rope digs in, milk splashes over her latex, and you’re like, ok, maybe I should stop. Then you don’t. I wish they had an option to stain the latex permanently and track it, like a “how badly did you use her today” meter, but whatever, they didn’t, and now I’m stuck thinking about it every time I open the game tab next to Twitter and Discord.

Tifa herself feels familiar and twisted at the same time. She’s clearly the same big-boobed brawler everyone knows from other games and mods, but here she’s just a busty cow toy, and the story doesn’t pretend otherwise. She hates being treated like that, calls herself not a cow, complains, whines, gets embarrassed when the milk keeps gushing anyway, and that mix of shame and forced pleasure really hits the kink. There’s this one moment where you have the rope wrapped almost to the point of leaving marks, and the game lets you mash the pressure a bit more. She’s breathing hard, cheeks flushed, eyes half-wet, and milk is literally spraying in short, sharp bursts like squeezed frosting. I laughed out loud because it looked ridiculous, then immediately replayed the same bit to see if I could sync her cries with the spurts. The torture angle is there, but it’s more about dragging out her helplessness than just hurting her. You’re not breaking bones, you’re overworking nipples until they can’t stop leaking. I will say the sound mix is a mess on one of the milking loops, there’s this tiny click in the audio that kept pulling me out, and I got irrationally pissed because I couldn’t un-hear it after noticing. But then she arches her back, breasts swollen and roped so tight you can almost feel the weight through the screen, and yeah, suddenly that little sound bug doesn’t matter anymore, even though it still kind of does and I won’t drop it.