Hotland
LASERS ON CONVEYORS? NO THANKS.
SOUNDS LIKE MY LEAST FAVORITE NIGHTMARE.Papyrus, if the protagonist calls in Hotland
Hotland (JP: ホットランド) is the fourth region the protagonist encounters in Undertale, following Waterfall. It contains locations such as Alphys's Lab, True Lab, the MTT Resort, and the CORE.
- Alphys's Lab, where she lives, is near the entrance of Hotland. This also holds the entrance to the True Lab.
- Mettaton hosts four game shows/performances during the protagonist's travel through Hotland.
- On floor R2, Sans sells Hot Dogs to the protagonist for 30G each.
- He does not appear once he appears in the Last Corridor or if Papyrus is killed.
- The protagonist can find the Art Club room on floor 2. So Sorry's fight occurs here.
- The protagonist can find the Burnt Pan and Stained Apron on floors 1 and 2, respectively. Bratty and Catty sell the Empty Gun and Cowboy Hat.
- Muffet fights the protagonist before they reach the MTT Resort. She does not fight the protagonist if they bought an item from the Spider Bake Sale on floor L3 in Hotland. Muffet can immediately be made spareable if the protagonist brought an item from the bake sale in the Ruins, which costs considerably less.
- The MTT Resort is a Mettaton-branded hotel which holds the entrance to the CORE.
After defeating Undyne, the protagonist continues into Hotland. Entering the Lab, they meet Alphys and Mettaton, the latter of whom subjects the protagonist to a quiz show. After the quiz show, Alphys upgrades the protagonist's Cell Phone, which includes links to two Dimensional Boxes.[1]
Alphys guides the protagonist through Hotland.[2] Along the way, she frequently posts updates to her UnderNet account, which are forwarded to the protagonist's upgraded phone. Mettaton also frequently appears and subjects the protagonist to various minigames. The protagonist uses the features included in their phone to complete these minigames.
Eventually, the protagonist battles the Royal Guards and Muffet, and reaches the CORE. In the CORE, Alphys struggles to guide the protagonist because of its changing layout.[3] At the end of the CORE, Mettaton transforms into Mettaton EX and fights the protagonist before they take an elevator to New Home.
After the protagonist defeats Omega Flowey and befriends Papyrus and Undyne, Undyne gives them a letter to deliver to Alphys. Alphys reads the letter and goes on a date with the protagonist because she believes that they wrote it.
After the date, Papyrus calls the protagonist and tells them that they should go to Alphys's lab.[4] Inside, a note from Alphys tells the protagonist to enter her "bathroom" if they want to know the truth.[5] The "bathroom" is revealed to be an elevator that leads to the True Lab.
At the end of the True Lab, the protagonist gets on an elevator that leads to New Home.
After the protagonist kills Undyne the Undying, they enter Hotland. Upon entering the Lab, Mettaton confronts the protagonist, but he leaves after they approach him aggressively. Alphys does not appear.
The Hotland elevator allows the protagonist to access the third floor immediately, though blue force fields block off the entire second floor of Hotland. The protagonist cannot use the elevator before Mettaton's dialogue in the Lab.
Throughout Hotland, the people who would usually appear have been evacuated, and all of the puzzles have been deactivated. The Royal Guards encounter the protagonist earlier as the protagonist walks through floor 1.
After killing Muffet, the protagonist then enters the CORE. They confront Mettaton at the end, who transforms into Mettaton NEO. After his defeat, the protagonist rides the elevator to New Home.
Hotland is an arid region covered in reddish-orange dirt rising above the lava below. Many of the puzzles in the area involve platforms, adding to the hot atmosphere, as well as foreshadowing the technology found in the CORE.
Hotland appears to be a very industrial area of the underground. Aside from being home to the CORE and Alphys's lab, Hotland also contains many steam vents, conveyor belts, lasers, elevators, and doors opened by solving puzzles. In some rooms, gears and cogs can be seen on the walls.
Hotland and the CORE are counted as a single region, which means that they share a kill counter.
Here, the protagonist enters the Lab for the first time, and is introduced to the River Person. Monsters such as Vulkin, Tsunderplane, and Pyrope are first encountered on this floor, but only after exiting through the right side of the Lab. This area mainly serves to introduce the protagonist to the steam puzzles and conveyor belts that are abundant through Hotland.
This room has a sentry station followed by a wooden bridge that continues into room 2. If the protagonist flees from Undyne and Papyrus is spared, Sans is seen sleeping in the sentry station. When Undyne gets to the sentry station, she pauses for a moment, sporting an angry expression, buying the protagonist time to outpace her. If Undyne is killed, Sans does not appear in the sentry station regardless of whether Papyrus was spared or killed.
Here, the protagonist can find a small room with a water cooler. When checked, the water cooler gives the protagonist a cup of water. Dumping out the water causes a small puddle to appear next to the water cooler, which gradually gets larger the more water that is spilled into it. Attempting to leave the room with the water causes it to evaporate, and the cup humorously evaporates as well. After leaving the room and going back in quick succession, the water cup gets erased by a mysterious force. If all of the water is poured out of the water cooler, there is a small tree growing in the puddle at the end of the True Pacifist Route.
If the protagonist spares Undyne by running away from her, she collapses when the protagonist reaches this room. If the protagonist splashes water on her, she gets up and walks back to Waterfall. If the protagonist pours out all the water in the water cooler while Undyne is passed out, then checks the now-empty water cooler, the check says "Sadistically, you've poured out all the water right in front of Undyne's eyes."
The second time the protagonist enters this room, the Clam Guy appears. They tell the protagonist that they came to Hotland to get a drink from the water cooler. If approached with a cup of water, they ask if the protagonist plans to look sophisticated by carrying the water around, and then informs them it is not working.
This area is a four-way crossroads that the protagonist enters from the west. The north path is initially blocked by the Royal Guards, who claim to be blocking the way for Undyne. After fighting the protagonist on floor 2, the path becomes unblocked. The south path leads to the River Person, who offers to ferry the protagonist back to Snowdin or Waterfall. The east path leads to the Lab. In the middle of all four paths, a SAVE Point is visible.
On the Genocide Route, instead of the Royal Guards blocking the path to elevator L1, a force field is present. This force field is deactivated once the protagonist reaches elevator R3.
The Lab is a two-floor building, with a hidden elevator on the first floor. It is where the protagonist meets Alphys and Mettaton. The latter subjects the protagonist to a Quiz Show.
Post battle, Mettaton leaves. As the protagonist leaves, Alphys offers to upgrade the protagonist's dated Cell Phone. Once Alphys departs into the "bathroom", the protagonist can explore the entirety of the Lab with the lights on. An Instant Noodles can also be found in Alphys's refrigerator.
After defeating Mettaton EX, the doors to the lab become locked, making the rest of floor 1 inaccessible. On the True Pacifist Route, the Lab can be entered after completing the garbage dump date with Alphys.
After exiting the right side of the lab, Alphys realizes she did not watch the protagonist's encounter versus Undyne.[6] The protagonist's phone gets frequent updates of Alphys's UnderNet statuses as they navigate the region.
Going up takes the protagonist to a long, vertical room consisting of two sets of conveyor belts going forward and backward. The first set is straight, but the next set contains several bends and curves. Shots of flame burst from nearby pipes, adding to the scenery. In between the two sets, a Vulkin NPC appears after receiving Undyne's Letter.
At the end, a SAVE Point can be found at the Magma Chamber, which is the first set of steam vents. It consists of several small islands, most with steam vents, and is surrounded by lava.
Stepping on these vents causes it to emit a large steam that pushes the protagonist towards the depicted arrow's direction. On the branching isle, the protagonist can choose to take the west vent to progress, or east to go south and to the Burnt Pan room. Progressing towards the north path causes Alphys to express her anxiety on UnderNet, and she eventually calls the protagonist.
Upon taking the southern path, the room has a steam vent that rapidly changes from left to right. Next to it are two islands with conveyor belts. The left island contains the Burnt Pan, while the right island contains nothing. The protagonist must get on the steam vent immediately after it switches to the left to get the pan.
Regardless of what island the protagonist lands on, conveyor belts on each side of the island take the protagonist back to the steam vent.
After receiving Undyne's Letter, A Pyrope NPC appears on the right island.
Upon entering the north path past the steam vents, the protagonist comes to another path that veers to the right. Soon after stepping into the room, Alphys calls the protagonist, and informs them of the orange and blue lasers nearby. She reports that they must be moving to avoid being hit by the orange lasers, and stay still to get past the blue lasers (similar to the orange and blue attacks). Afterward, she hangs up. In the path, several rows of orange and blue lasers, which the protagonist must evade to make it safely through the path. At the end of the laser field, the path veers upward into the next room.
In this room, the protagonist comes across the reactivated door puzzle. On the left and right, the protagonist must solve two puzzles to move forward. To reach these puzzles, the protagonist must step on a steam vent that rotates clockwise between the north, south, east, and west. Upon entering the room, Alphys informs the protagonist that the right path is easier, and they should try that puzzle first.
On the right path, Business Dude and Fire Coffee are found sitting on the ground.
Business Dude tells the protagonist that they managed to catch Mettaton's show on their phone, and remarks about how realistic the human looked. Fire Coffee talks about the size of Mettaton's fan club. Inside the puzzle room, the disembodied fox head explains that their co-workers refuse to help them solve the puzzle, and questions if they even want to go to work today. After completing the puzzle, they remark surprise when checked, and conclude that the protagonist must be a "total nerd" to solve the puzzle.
The left puzzle is blocked by a blue laser, which impedes the protagonist's progress. Soon after entering the room, Alphys calls the protagonist, and turns off the blue laser, allowing further progress. Like the right puzzle, two NPCs wait outside the door, named Fuku Fire and Skateboard Girl. Fuku Fire exclaims relief about the laser going down, then questions what she will do. After thinking, she decides to continue standing where they are. Skateboard Girl is happy about the laser blocking them from leaving, as it gives them an excuse to skip school, but realizes that it was already summer vacation and expresses displeasure over school.
After solving both puzzles, a door to the north opens, letting the protagonist proceed.
After solving the Reactivated Door Puzzle and leaving room 6 through the now-open doorway, the protagonist is greeted with a small pathway, and a steam vent pointing to the left. In this room, Alphys calls the protagonist again and begins to explain the Reactivated Door Puzzles. Once she realizes that the protagonist has already completed the puzzles, however, she becomes embarrassed and quickly hangs up. On the Genocide Route, the Royal Guards are present and initiate a battle against the protagonist.
Walking on the steam vent projects the protagonist through three other steam vents, which eventually lead the protagonist to a lime-shaded floor with several large dots. The protagonist is unable to turn back once they reach this area.
Upon going to the right, the protagonist enters Mettaton's cooking show set. The set consists of a wall fragment, against which are a fridge, a countertop, a microwave, and an oven. An artificial window is situated above the countertop, and sugar, milk, and eggs sit on top of the counter. Another countertop sits at the front edge of the set, which consist of a sink and a cutting board. Off to the side to the right is a small countertop, which has a can glued on top.
Here, the protagonist must face Mettaton again in his Cooking Show. Afterward, the protagonist may continue to the right.
The Core View consists of a long walkway with a view of the CORE in the distance. Along the walkway, Alphys calls the protagonist and tells them not to worry. At the end of the passageway, an elevator is visible, which takes the protagonist to Floor 2.
Here, the protagonist must solve more puzzles such as the conveyor belt puzzle and the vent puzzle. At the end of floor 2, the Royal Guards fight the protagonist as mini-bosses. Sans also sells Hot Dogs near the beginning of this floor, provided that Papyrus has not been killed, or he has not yet appeared in the Last Corridor.
On the Genocide Route, this floor is entirely blocked off by force fields. Because of this, the protagonist cannot acquire the Stained Apron or fight So Sorry.
After exiting the elevator, Heats Flamesman and a path leading off to the left are visible. Heats Flamesman tells the protagonist their name when talked to, then asks them to remember it.
The left path leads to Sans, who is selling Hot Dogs for 30G each. No monsters may be battled in this room. Nearby are two NPCs, both with Hot Dogs of their own. One of them, called Hot Dog Harpy, remarks on the snow atop Sans's Hot Dog stand, then decides he must be too lazy to clean it. The other NPC, a Vulkin with a Hot Dog, exclaims "Toasty Bun!" when talked to. If Papyrus is killed, these NPCs do not appear. Next to the Hot Dog stand, a path leads west, which takes the protagonist to the next section of Hotland.
This room has three visible passages, along with one secret passage directly north of the southern path. The path east leads the protagonist back to Sans's Hot Dog stand. The south path leads to a room with the Stained Apron, an armor item that slowly heals the protagonist. The west path leads onward to the Conveyor Belt Puzzle.
After receiving Undyne's Letter, A Tsunderplane NPC appears to the left of the invisible path.
An invisible path to the north leads to the Art Club room. It can only be seen when the protagonist walks on it. Here, the protagonist may fight So Sorry if the game is launched while the player's clock is set to October 10th, at 8:00 PM (all day on the Nintendo Switch version).
Here, the protagonist must solve the Conveyor Belt Puzzle to move forward. Upon entering the room, Alphys calls the protagonist to explain the puzzle to them. Upon completing the puzzle, a path to the left becomes accessible, allowing further progress. Here, the protagonist must solve The Vent Puzzle. Shortly after approaching the puzzle, Alphys yet again calls the protagonist, and tells them that she has to go to the bathroom. Afterward, she does not call the protagonist until after the Royal Guards have been defeated.
After completing the puzzles, the protagonist enters the "Bad Opinion Zone" (likely named due to Alphys's complaints on UnderNet about "Mew Mew Kissy Cutie 2"). Nearby is a SAVE Point, a mouse hole, and a safe atop a small table. Checking the table informs the protagonist that the cheese inside has been melted by the laser safe, causing it to become stuck to the table. On the True Pacifist Route, the dialog of the table changes.[7]
East of the Bad Opinion Zone is a room with a bend that veers to the left. Bordering the pathway are inaccessible island with pipes that constantly shoot steam. Here, the Royal Guards approach the protagonist and warn them of a human in a striped shirt roaming Hotland. After realizing the protagonist is said human, they attack. After the battle, the protagonist travels across the bend and receives more notifications from Alphys.
The protagonist comes across another dark room. After traveling a few steps to the right, the lights turn on to reveal a large room split into three connected segments. The protagonist appears on the middle segment, which initially consists of six bombs disguised as various objects. The bottom segment consists of three lasers colored blue, orange, and blue. A conveyor belt to the right leads to a vent, which transports the protagonist to the top segment, which contains a single large bomb.
Here, the protagonist faces Mettaton's news report. Afterward, the protagonist may continue forward to a pathway that veers upward.
This room consists of a walkway that veers to the left. Another view of the CORE can be seen in the distance. Along this walkway, Alphys calls the protagonist and tells them not to worry about meeting Asgore. The protagonist continues to an elevator leading to floor 3.
This is the last stretch of Hotland before the protagonist reaches the MTT Resort. Here, the protagonist must face another reactivated door puzzle and Mettaton's Multicolor Tile Puzzle. The protagonist must also fight Muffet here.
After leaving the elevator, a path to the east leads the protagonist to Muffet's Spider Bake Sale. Here, the protagonist can buy a Spider Donut and Spider Cider for 9999G each. Besides the bake sale, the scared donut guy lies in this room, holding a Spider Donut. When talked to, they claim they did not want to buy a donut, but Muffet scared them into buying it and spending all their money.
Going forward takes the protagonist to the second Reactivated Door Puzzle. After beating this puzzle, a door to the far right opens up, allowing passage.
The room consists of many square islands with directional vents on top. The protagonist must reach the puzzle by navigating the islands using the vents.
After solving the puzzle directly north, two doamond-headed NPCs, Diamond Boy and Tall Diamond Boy, appear. They talk about their favorite moments on Mettaton's show and provide hints that foreshadow the battle against Mettaton EX.
The lower door puzzle is blocked by lasers, which the protagonist must dodge. After beating this puzzle, Alphys calls the protagonist, and ask if they want to watch anime with her. Saying yes causes Alphys to talk a great length about her favorite anime, "Mew Mew Kissy Cutie". Saying no simply causes Alphys to hang up. On the way back, a stray cactus can be seen to the north, which the protagonist stops to look at if interacted with despite being on a conveyor belt.[8]
After beating the Reactivated Door Puzzle, the protagonist reaches the Spider Entrance, which contains a SAVE Point and a doorway to Muffet's Lair. Strands of webs can be seen in the background.
Muffet's lair consists of spider webs scattered throughout the floor. Walking across the webs slows the protagonist's movement. Spiders hang from the ceiling, retracting when the protagonist gets close. At the center of the room is a large stretch of spider webs, which progressively slows the protagonist's movement until the webs prevent them from moving entirely. when this happens, Muffet engages in battle against the protagonist intent on killing them for being too stingy with their money and not buying anything, but does not attack if they bought at least one of her 9999G items.
The path out of Muffet's Lair leads to a small stage, where Mettaton begins his musical performance. In this room, the game window on the PC versions of Undertale is renamed to "UNDERTALE the Musical". After the performance, Mettaton drops the protagonist down to the room containing the Multicolor Tile Puzzle. Mettaton fights the protagonist after the puzzle and is defeated using the laser attached to the protagonist's phone.
After, the protagonist comes across a small room with a four-way crossroads. Nearby, the Nice Cream guy sells the protagonist Nice Cream for 12G each if the Royal Guards were killed, and is out of stock if they were spared, with all of the Nice Cream having been bought by them.
The south and west paths lead back to the Multicolored Tile Puzzle and "Undertale the Musical", respectively. The east path leads to elevator R3, where Heats Flamesman waits. They ask the protagonist if they remembered their name. Regardless if the protagonist says no or yes, Heats Flamesman becomes shocked, and questions how they could be so easily defeated. The north path leads to the MTT Resort.
The MTT Resort is a hotel situated at the end of Hotland. At the entrance to the resort, the protagonist can meet up with Sans and buy items from Bratty and Catty. Inside, they can buy items from the MTT-Brand Burger Emporium and sleep at the hotel. The MTT Resort connects directly to the CORE.
On the Genocide Route, Alphys has evacuated everyone except Burgerpants; he tells the protagonist that Mettaton always has him work, regardless of the situation.[9]
The CORE is a highly industrial facility that produces power for the entire underground. Inside the CORE is an elevator to New Home, which is blocked by Mettaton. Mettaton diverts from Alphys's plans and engages the protagonist in a final confrontation.
Toby Fox says in the UNDERTALE Art Book that Hotland was originally meant to be filled with robots, but that it "felt weird to have any besides Mettaton".[10]
Toby initially wanted to implement an arcade in Hotland, where it would have been possible to play games while Monster Kid made various comments, but this idea was scrapped before being reused for The Legend of Tenna in Deltarune.[11]
Hotland received an expansion in the Undertale 10th Anniversary Stream. In between the Royal Guards room and bomb defusal room, a new school, Hotland High, is present. The school has multiple rooms, including an outdoor area, a hallway, and a classroom.
The outdoor area is fenced off and consists of a basketball court spanning most of the ground. The building exterior has a sign reading "HOME OF THE FIRE-ES" hanging above the windows, and a poster depicting the Fire-E mascot is situated next to the sign. The entrance to the school is situated at the top-left of the area.
The interior hallway has three doors along the northern wall, separated by sets of green lockers. The left door is inaccessible, and the middle door is blocked off by the hall monitor, leaving the right door as the only accessible room. The far-left of the room has a water fountain expelling fire, above which is a lopsided poster of Fire-E. The Ficus Student is situated next to the fountain, and the Milk Student stands outside the rightmost door.
Entering through the rightmost door leads to the classroom, which contains six student desks facing a teacher's desk to the right. The wall is bright blue and decorated with clouds. The protagonist stands in for the Milk Student as the school's exchange student, and Mettaton also makes an appearance. After class, Mettaton directs the protagonist outside the school, and the region continues as normal.
Artwork of several characters playing volleyball in Hotland from Undertale's 5th anniversary.
The border for Hotland available on the console releases of Undertale.
- The video game found during the MTT News scene is heavily implied to be Undertale itself. It is graphically similar to the Undertale box cover and uses the same sprite as the game behind mysterious door that was programmed by the dog. Mettaton states that his appearance does not occur until three-fourths of the way through the game and that the game is one where the player should check everything twice if checked twice (referencing the dialogue changing in the game if something is checked or spoken to twice.)
- In the MTT News segment, the line "THIS NEWS REPORT... IS TURNING INTO A DISASTER REPORT!!!" is a reference to the 2003 PlayStation 2 game Disaster Report.[12]
- Mettaton's musical performance is a reference to the "Maria and Draco" opera from Final Fantasy VI.[13]
- The design and fact that this area contains machinery and lava might be a reference to the Land of Heat and Clockwork from Homestuck. Another Medium was originally going to be a Homestuck song, titled Patient, which used the Doctor leitmotif. This song, however, was left unfinished and unused.[14]
- ↑
Here, I upgraded it for you!
— Alphys
It can do texting, items, it's got a key chain...
I even signed you up for the underground's No. 1 social network!
Now we're officially friends! Ehehehe! - ↑
Using my knowledge, I can easily guide you through Hotland!
— Alphys
I know a way right to ASGORE's castle, no problem! - ↑
I work at the CORE. The inside is a maze made of swappable parts...
— Charles
That means we can shuffle the layout at will. - ↑
I FEEL STRONGLY AND FOR NO APPARENT REASON.
— Papyrus
YOU SHOULD ALSO GO... THERE.
TO HER. LAB... HOUSE.
I HAVE ONLY GOOD FEELINGS ABOUT THIS.
GOODBYE. - ↑
This isn't anyone else's problem but mine.
— Alphys's note
But if you don't ever hear from me again...
If you want to know "the truth."
Enter the door to the north of this note.
You all at least deserve to know what I did. - ↑
ALPHYS updated status. just realized i didn't watch undyne fight the human v.v
— Alphys, UnderNet - ↑
(Seems like the mouse hacked the safe and took the cheese out.)
— Narration. - ↑
(You stop to smell the flowers.)
— Narration - ↑
Evacuation? You're yanking my chain, little weirdo.
— Burgerpants
So WHAT if everybody else left work? So WHAT if nobody's buying anything? - ↑
Hotland was originally going to be full of robots and cyborgs but as time went on it felt weird to have any besides Mettaton.
— Toby Fox, UNDERTALE Art Book, pg. 172 - ↑ 前からずっと、「友だちといっしょにゲームをしているあの感じを、ゲームの中で再現したい」と思っていました。みんな口々に冗談を言ったり、画面の中で起きたことにちゃちゃを入れたり、みんなに見せたいがために、わざとバカなことをしたり…。そういうのを、ずっと前からやりたくて。
本当は『UNDERTALE』で、「ホットランド」にゲームセンターを作りたかったんです。モンスターの子といっしょにゲームができて、プレイヤーがゲームをしているあいだ、モンスターの子がいろいろコメントする、っていう…。「THE LEGEND OF TENNA」のシーンで、本当に友だちとゲームをしているように感じてもらえたら、うれしいです。 ("For a long time now, I've been thinking, "I want to recreate that feeling of playing games with friends, right inside the game itself." Everyone cracking jokes, chiming in about what's happening on screen, deliberately doing silly things just to show everyone… I've wanted to do that for ages.
Actually, in UNDERTALE, I wanted to add an arcade to Hotland. You could play games with Monster Kid, and while the player was gaming, Monster Kid would comment on all sorts of things… If the scene in THE LEGEND OF TENNA makes you feel like you're really playing with friends, I'd be thrilled.") — Toby Fox, Nintendo DREAM Vol. 376 (September 2025 issue), page 41. - ↑ "Mettaton forces the main character to participate in a live news broadcast. If the player chooses to report on a nearby a glass of water, Mettaton will shout:
- WAIT A SECOND. THAT’S NOT A GLASS OF WATER!!!
- THAT’S... A BOMB!!! OH NO!!! THIS NEWS REPORT...
- IS TURNING IN TO A DISASTER REPORT!!!
- ↑ Final Fantasy VI Adv: Oh, Maria on YouTube
- ↑
not gonna use this for anything
— fwugradiation on Tumblr, October 09, 2012.