I’m sure everyone and their goat mom has heard about Undertale by now, but the hype is real, it’s great, I loved it, I highly recommend playing it! (In fact, if you haven’t played it yet, you should check it out now while it’s on sale on Steam.) The game is a lot of fun and designed to deeply engage the player for multiple runs. With a retro style and deceptively simple gameplay, its impressive ability to reach the player’s emotions (it gives you the feels) through fascinating storytelling, innovative game mechanics that speak directly to the theme, excellent world-building and music, and a lovable cast truly sets it apart from other games in its genre and our expectations of what video games can do. It also lends itself easily to parties, so I’ve cooked up a ridiculous amount of food, a skele-ton of fun games and puzzles, and a variety of decorations to recreate the vibrant world and adventure of Undertale for you and your friends.
Remember that all of my guides in The Fan’s Party Planner series are fancy brainstorms of mostly untested ideas, founded on my knowledge of the game and my amateur experience with event planning, cooking, crafting, etc. It’s completely up to you how you use this guide, if it’s for instruction, inspiration, or just for a laugh. Now, before you make some big decisions, ask yourself: kid, do you wanna have a good time?
Have fun with this and fill your letter or evite with puns, or make it sound like Papyrus and Undyne wrote it together with lots of excited yelling. After the address for your party’s location, add an asterisk and, at the bottom of your letter, write “*Don’t tell Jerry.” (If you’re inviting a real person named Jerry, write “*Don’t tell Flowey.”) Encourage guests to dress up as Undertale’s creative and funky characters. Let your guests know if you’re planning activities that may require clothes and shoes appropriate for outdoor spaces or physical activity.
Decorations: The list here has been placed in alphabetical order for easy shopping or reference, but try grouping these decorations to turn specific rooms or spaces into Undertale’s distinct environments. For example, you can make one room into Snowdin by hanging white, blue, and green or orange streamers and adding fake snow, puzzles, bones and skeletons, joke and physics books, fake evergreens, holiday lights, and a stuffed white dog or bunny.
A little yellow bird
A really cute trashcan
A sign advertising hot dogs
Anime posters or figures
Bag of dog food
Bones or skeletons: Go ahead and raid your Halloween supplies. If you’ve got full fake skeletons for some reason, you can even dress them up.
Cattails (real or fake): Water sausages. Set these in vases or display them on the food table.
Crepe paper: Purple, white, blue, black, red, orange, yellow, or gray streamers can be used alone or mixed together to reference specific areas in the game.
Fake Christmas tree or evergreen
Fake red leaves: Scatter these around your Ruins area.
Fish-shaped mug or sculpture
Ghosts: Raid that Halloween stash or use tissue paper to make simple ghosts.
Goat or Toriel plush
Gray arrow signs: Model these on the vents in Hotland. Make them out of construction paper and place them on the floor. Be careful to use adhesives that won’t damage the floor. Use them to guide guests to important areas like the kitchen or bathroom. Make a party rule that anyone who steps on them has to say “Whoosh!” (Please, it’ll be cute.)
Heart cut-outs: You can make these out of construction paper and either attach them to the wall or use thread to hang them. Represent the human souls’ different colors. You can also add upside-down monster souls in gray, if you’re the kind of demon who ever saw more than one.
Holiday light strings
Joke books and physics textbooks
Laboratory equipment: Look for “mad scientist” Halloween decorations or get creative with chemistry supplies or glass vials, safety goggles, and cleaning gloves.
Mushroom toys or decorations
Puzzles: Go for ones that won’t take up a lot of space or involve a lot of pieces like Rubik’s cubes, crosswords, word searches, Sudoku books, or attractive single-player puzzles like wooden manipulatives or metal link puzzles.
Snail toys or decorations
Spiderwebs: Again, raid that Halloween supplies for fake webs made from cotton or polyester. Stretch these near the kitchen, dining room, or pathway crossroads and attach fun things for Muffet like fake spiders, music notes, pictures of baked goods or tea set items, and a flyer for the Spider Bake Sale.
Star-patterned drape: Emulate the wishing caverns in Waterfall with a scarf or a black tarp splattered with glitter and white or blue specks. If you have one, set up a telescope nearby.
Umbrella holder with umbrellas
Undyne’s spears: Cut basic spear shapes out of large pieces of aqua-colored paper and attach them to walls so they appear to shoot out of the floor.
White dog or bunny stuffed animals
Yellow flowers (real or fake): Set these in vases around your party, or, if you can get large amounts of silk or paper flowers, arrange them into flowerbeds or piles around entrances or scatter them carefully around your Ruins, Lab, or New Home areas.
Echo Flowers: Stand large, fake blue flowers in vases or mount them in flowerpots with filling or a Styrofoam base. For each flower, use a paperclip or clothespin to attach a small piece of paper with a cute or funny message to one of the petals. Provide blank paper slips, a pen, and extra paperclips or clothespins on a tray near the flowers. Encourage guests to write their wishes or any funny quotes they overhear at the party on paper slips and attach them to the flowers so they can “echo” for other guests to read. Messages that get taken down to make room on the flowers can be placed in a jar for guests to review as the party winds down or take home as a small souvenir.
Your Best Friend: There are two ways to make Flowey the Flower. The easiest way is to print a color copy of his sprite, glue it to a long, flat wooden craft stick, and jam the stick in a sturdy base like a flowerpot filled with dirt or packing beans so Flowey stands up and the stick is hidden. However, the creator of Undertale has asked fans to follow certain rules for his characters’ images, so make sure you use the sprite print responsibly and obtain it from responsible sources. The second way is to use a large, fake yellow flower with room for you to paste or draw a Flowey face in the center. Attach the flower or flower head to a sturdy stem like a wooden dowel or knitting needle and cover the stem with green paint or crepe paper. Stabilize the dowel in a flowerpot packed with dirt, sand, filling beans, pebbles, or by setting it in a Styrofoam base. The smaller you make Flowey, and the closer you keep him and the pot in relative size, the easier it should be to make him stand up. Provide Flowey with a chalkboard or sign to “welcome” guests with his cheery “Howdy!”
The Fallen Humans: Seven humans fell to the underground before Frisk, each with a story we’ll likely never fully understand, but we can find the items they left behind to help us on our journey. To do this display, you’ll need a red hair ribbon and toy knife; an exercise glove or boxing mitt and a headband “with a picture of abs on it”; a pair of ballet shoes and a tutu; a notebook and a pair of glasses; a toy or lightweight frying pan and an apron; a toy water pistol and a cowboy hat; and a locket and a more realistic-looking toy knife or costume prop. Not all of the items found in-game are safe to keep lying around as party decorations in real life, so I have changed a few of them to toys or costume props in the list. Construction paper hearts in the human owners’ soul colors either near the objects or attached to them will clearly distinguish these objects from any similar items, such as your own frying pans and glasses, you may have in your home. You can arrange these objects together as one display or place them in more discreet locations around your party for guests to find and gather in a Box for small prizes.
Food: There is so much food in Undertale! I mean, you eat food to heal, so it makes sense that you would carry a lot of it, but there is a huge variety even outside of healing items. With all these choices, you can easily arrange a smorgasbord to your preference.
Apples or apple slices
Burgers and fries: Supply plenty of ketchup.
Cheese: Knowing that some day all parties will serve cheese fills you with determination. Make a simple tray of cheese cubes or slices and crackers for an easy appetizer or buffet piece. Place a mouse toy or figure nearby.
Chocolate: Just chocolate. You can cut it up into little pieces or offer heart-shaped chocolates.
Hot dogs: Cut little cat ears onto the ends for “hot cats” (if you want to put in that kind of effort) or substitute bratwursts so you can have “water sausages.”
Legendary Hero Sandwich: If you have a large crowd, this sandwich could be your savior. Slice an entire baguette lengthwise, stuff it with your chosen fixings, and cut it up to share.
Nice cream bars: Unless you make your own ice cream, it may be hard to get kind phrases on every stick. Instead, purchase ice cream bars that come in wrappers and write kind phrases on them in Sharpie.
Potato chips: Make sure you have plenty for everyone.
Quiche: While this may seem a little advanced, I promise you can make this! The hardest part of a quiche is the crust, and it is totally fine to buy that premade. Your basic quiche is just eggs, milk, and cheese, so find a recipe you like and give it a try! I like to add ham or bacon and shredded raw spinach, but you can easily customize your quiche to your heart’s desire.
Ramen: For the people who already blew their budget on a Mettaton impersonator.
Small, multicolored hard candies
Spaghetti: You cannot have an Undertale party without spaghetti. You cannot. For smaller parties, consider having a dinner rather than a buffet and serving spaghetti family-style. For a larger party or buffet-style serving, either make a “spaghetti bake” in advance that you can warm in the oven or schedule a “pasta break” in the party to so you can cook fresh noodles. For this last idea, consider offering a pasta bar where guests can choose a sauce, a meat, and a vegetable for their individual bowls. You can heat these chosen toppings in the microwave for quick, single-serving turnarounds or offer two preset combinations so you can cook each batch for multiple guests on the stove. For less work, keep tomato sauce and other desired cooked toppings (meatballs, sausage slices, peppers, spinach, etc.) warm in a crockpot and allow guests to pour their own sauce while you keep the noodles coming.
Starfait: Make a layered fruit-and-yogurt parfait in glamorous pinks and purples. For fruit and yogurt flavors in these colors, look for strawberry, raspberry, blackberry, blueberry, and cherry. Serve in a large, tall container like a trifle dish. Consider using a star-shaped cookie cutter to cut a star shape out of a large slice of fruit to place on top of the yogurt or on the edge of the glass for extra flair.
Sushi: Unless you are a trained sushi chef, I would recommend purchasing this.
Temmie Flakes: Tear up construction paper scraps and display them in a bowl. Do not eat.
Two-stick popsiclesDouble-stick popsicles
Glamburgers: What makes this an advanced recipe is putting the “glam” in Glamburger. There are a couple ways to do this. The first is to bake your own hamburger buns and dye the dough purple or pink. The second is to spend a bit of gold on edible glitter or food spray paint. You can also make your own “edible glitter” with sugar and food dye, but this could end up making the buns very sweet. I don’t recommend using food-dye in the meat, however, as guests are more likely to be skeptical of purple beef than a bright pink bun.
Cinnamon Bunny: The hardest part of this is going to be shaping a cinnamon bun into a bunny. You can make cinnamon rolls from scratch or buy premade dough, but before baking, use a knife and some careful squishing to shape each roll into the shape of a cartoon bunny head. Use toothpicks to hold the dough in shape for baking. Ideally, you want the bun to look like the head of a bunny-shaped marshmallow Peep, and you can use the icing to add features like eyes and whiskers. You may need to experiment to figure out how extreme your cuts and shaping need to be for the dough to keep its shape as it expands.
Butterscotch-Cinnamon Pie: I don’t know how to do this. Your simplest bet is probably making the equivalent of a chocolate pudding pie with butterscotch- and cinnamon-flavored pudding or making a flavored marshmallow meringue. The Geeky Chef has an excellent recipe here, but it looks nothing like the game image. I mean, butterscotch is just butter melted with brown sugar—it’s a flavor, not really a substance. I’ve seen lots of people coming up with butterscotch-cinnamon pie recipes, and they all sound delicious, but look at Toriel’s pie!
There’s a dome of crust on that thing! None of the recipes I have seen so far have used a crust, and maybe you could get a lattice crust on one like a treacle tart, but I have no idea how you would turn what should have the consistency of jarred caramel into a substantial filling capable of supporting that crust. Unless we’re eating a solid brick of butterscotch-cinnamon fudge or 15 pounds of melted-down butterscotch and Red Hots, there has to be something else in that pie to hold it up. My bet’s on snails.
Water: Have this at every party, please.
Tea: The blatantly obvious choice. I don’t know what to do for “sea tea,” maybe something energizing with citrus, but chamomile could be a good substitute for soothing golden flower tea.
Hot Chocolate: You know, if you don’t want tea. Or if you’re a demon child in a striped sweater.
Apple cider: Draw a giant purple spider on the pitcher, I dare you.
Soda: Include a yellow kind if possible.
Butterscotch-Cinnamon Pie: Pudding shots are great because you can emulate pretty much any dessert and get all kinds of colors through the different pudding flavors. For this recipe, you’ll make pudding shots with a box of butterscotch pudding mix, cinnamon or cinnamon sugar, 8 oz. of heavy Cool Whip, and proportions of milk, plain vodka, and cinnamon liquor according to your preference and recipe. Add cinnamon to taste, though you may not need it if you use cinnamon liquor. Pour the mix into small plastic shot cups and chill for at least one hour. If desired, sprinkle each cup with a little cinnamon sugar before serving.
Megalovania: I looked for a drink that was blue, generally sweet, and hid an unexpected powerful bite, and the Internet showed me a cocktail called “Adios, Motherfucker.” It seemed rather fitting for the Megalovania option. Use your preferred version of the recipe and serve ice-cold.
Determination: Don’t give up! You must stay determined! Offer a sweet, fortifying draught in brilliant red by making a Dirty Shirley with cranberry ginger ale or halving the ginger ale portion between plain ginger ale and Cheerwine.
THE GREAT PAPYRUS: This is a non-alcoholic option, though you can easily change that. Make a virgin iced piña colada mix or a frozen fruit smoothie with pineapples, bananas, and light-colored yogurt. Pour into tall glasses and top with a layer of fresh strawberry slices and/or peeled orange pieces so the color can be seen when you look at the glass. Serve with brightly-colored straws and little festive umbrellas.
Underground Idol: Are you the star everyone craves? Part-photo booth, part-fashion show, part-vogue dance-off, “Underground Idol” spoofs the popular Mettaton battle. First, provide fabulous costume pieces (boas, tutus, sunglasses, hair decorations, sequined things, sexy square-shaped cardboard boxes, etc.), game character costume pieces (eye patch, lab coat, white dog ears, crown, red scarf, striped shirts, etc.) and costume make-up (lipsticks and glosses, sparkly palettes, face paint, etc.) and invite guests to transform themselves into glamorous stars. Set up a photo booth with a sparkling backdrop in rich colors and game-inspired props (bones, teacups, manga, toy spear, toy knife, Flowey, etc.) where guests can pose and take pictures. If you have a Polaroid, use it to take the photos so you can display them as part of the competition and so guests can take the photos home as souvenirs. If you’re using a digital camera or phone, distribute the photos to guests digitally soon after the party.
For the second part of the activity, invite guests to sign a call list for a dueling pose-off. Guests do not have to sign up if they don’t want to, but you will need at least two participants. While guests use the photo booth and sign up, set up a “stage” area by clearing a section of floor big and safe enough for two guests to dance, pose, and throw and dodge attacks. Divide the stage down the middle with a tape line.
Once you have your call list, explain that you will call participants to the stage in pairs to battle for the title of Underground Idol. For each round, you will play one minute of music. While the music is on, participants must dance and impress the audience with their moves and style. Every 20 seconds, you will pause the music. When the music stops, guests must either strike a fabulous pose or “attack” their opponent. Each participant will be offered three soft items around the size of tennis balls to “attack” with (yarn balls, rolled up socks, sponges, etc.), which they may keep near them as they dance. If they manage to hit their opponent three times, once each time the music stops, they win the round by inflicting a “Game Over” on their opponent. Their opponent, however, may try to dodge the attack, and a successful dodge will permit them to either strike a second pose for audience approval or attempt to hit the attacker with one of their three items. This counterattack counts as one of the retaliator’s three attempts to hit their opponent, and choosing not to counterattack works the same as a “miss” and negates the possibility of winning by “Game Over.”
However, while the “Game Over” option provides incentive to attack in the first turn, the true aim of the show is to win the hearts of the audience (guests who are not participating, players waiting to go on stage, players knocked out of the competition), who will decide the victor at the end of the three rounds by cheering the loudest for their favorite candidate. As the host of the party and this show, the MC, you should also take it upon yourself to drum up enthusiasm and audience investment. Encourage people to cheer for great dance moves and poses or offer sympathy when someone is hit or misses an attack. The player who peacefully and elegantly posed and got hit in the first round should “seek revenge” or become the “noble pacifist,” dodging and thwarting the “ruthless villain’s” relentless attacks. You know, really amp up the drama and get those ratings soaring! Face round winners against each other until the last two or three players remain. Two players can face-off like usual, but for three players you will need to either change the duel so they can all compete at once or organize a quick round-robin.
Comic Dub Cold Reading: Undertale has proven astoundingly attractive to comic artists, animators, and voice actors, fans who have generated a multitude of fandom in-jokes and internally famous works with impressive animations and dubbed comics. For this activity, your guests will try their own voice acting skills on live performances for some of these videos. To do this activity, you will need a computer, Internet access, a projector or a large TV, and any necessary connector cables for the computer and chosen screen. Before the party, choose a few favorite Undertale comic dubs or cartoons that you think guests would enjoy performing and organize the videos in a YouTube playlist or a list of hyperlinks. The videos should be fairly short and represent a variety of characters, though not every video needs to show the whole cast.
Create a simple script for each video with character names, dialogue, and any specific sound effects guests may need to supply such as laughter, crying, etc. Fold each script over so that guests cannot see the dialogue inside and write a single-sentence summary of the video on the outside of the script. Use the short summaries to pitch each script to your guests and help form teams to perform them. Allow guests to work on multiple scripts or repeat scripts if desired or so each guest who wants to perform gets the chance to do so. Give guests some time to gather in their teams and practice their scripts. It is up to you whether you would like to show the videos with sound before guests choose scripts, after they perform, or at all. Some guests may want to hear the full dub or see the silent video to practice, so be prepared to either offer a preview or explain that the videos aren’t available for study. When the performers are ready, have them come up to where they can easily see the display screen or laptop without blocking the audience. Play the videos on mute so the guests can read or perform their lines with the animation or comic panels. Hilarious mistakes will be made and stars will be born. Be prepared to reset in case performers want to try again or other guests want to try a popular dub.
For a simpler, lazier activity your guests may find more comfortable, simply run the playlist on the big screen and let guests enjoy the videos like a series of skits. You can invite guests to vote for their favorite video or take this opportunity to play longer videos than you might be able to run for live dubs.
Please limit this activity to private, free events you host as personal parties for yourself and your guests, and make sure to give credit to the videos’ original artists and actors. You can credit the creators by announcing their names before playing each video or by indicating their original authorship on the scripts. If you wish to use this activity for a large public-access event such as a public library activity or a college club’s campus outreach, contact all appropriate artists for permission before using the video in your activity. Remember also that the creator of Undertale has requested that fans respect his conditions on the sale of fan work based on his content, so be sure to follow these conditions when communicating with artists. This process can become complicated when comic dub videos are uploaded by voice actors who did not make the comic but received permission from the original artist, as you will need to get an OK from all involved parties.
Backyard Bullet Hell: Frisk spends a lot of time dodging “friendliness pellets” inside a tiny box, so let’s bring this battle system into real life! You can choose to play either a Pacifist or No Mercy run. For both versions, you will need a large, safe play area like a grassy yard or gym floor; separate teams of monsters and humans, with monsters greatly outnumbering the humans (e.g., 5 vs. 2 or 8 vs. 4); and a variety of safe, quirky objects for monsters to use to attack the humans (dodge balls, paper towel tubes, balled-up socks, water balloons, etc.). Like Undertale battles, the monsters and humans will take 1-minute turns attacking or acting, so also keep a timer and a whistle on hand to let teams know when their turn is up. Appropriately, Pacifist should be harder for the humans to win, and No Mercy should be harder for the monsters.
Pacifist—To set up a Pacifist game, draw one line down the center of the field, designate areas behind the field ends for inactive monsters and humans, give monsters attack items on their side, and tape 2-3 different “Act” options to the back of each monster’s shirt. “Act” options should be simple actions humans can do on the field (Flirt, Hug, Sing, Tease, etc.) to “befriend” monsters. Monsters will know what action befriends them when the game begins, but humans should not.
During their turn, monsters try to knock out humans by hitting them with the attack items. Humans may dodge the attacks, but they may not strike back with the monsters’ items. Humans can take three hits within a turn, and the third hit knocks them out. Knocked-out humans must stop play and wait behind their side of the field. Hits reset at the end of a turn, so active humans who have been hit during the monsters’ turn will be able to take three hits again during the monsters’ next turn. Inactive/knocked-out humans do not return at the end of a turn. The monsters win if they knock out all of the humans. However, if a human catches a monster’s attack before it touches the ground, they “save” a human teammate and automatically bring the human who has spent the most time out of play back to the field.
During the humans’ turn, the humans will work together to befriend monsters. Humans may interact with as many monsters as time allows, but only one human may perform at a time, representing the rest of their team. Humans may “check” or “act.” When checking, the humans’ representative chooses a monster and declares, “Check [monster’s name].” The monster then loudly announces a clue as to what their befriending action option is. The human may then decide to “Act” with this monster or another or “check” another monster. When acting, the active human chooses a monster and declares, “Act [monster’s name].” The monster then turns around so the human can see the available actions. Once the human has chosen to “act,” they may not confer with the other humans or choose a new monster until they have performed an action. To choose an action, the human gets the monster’s attention and performs the action without naming it. The human may announce the action if the monster is uncertain what they performed. If the action was correct, the monster no longer wishes to fight their new friend and leaves the field to watch the rest of the game. If the action was incorrect, the monster may respond with a quip, and the humans must confer and choose another monster. If there are no other monsters, the humans’ turn ends. The humans win if they befriend all of the monsters before they are all knocked out.
No Mercy—To set up a No Mercy game, draw one line down the center of the field, designate areas behind the field ends for inactive monsters and humans, give monsters attack items on their side, give humans a few balls or pool noddle halves, and draw another line parallel to the center line two feet into the monsters’ territory. No Mercy plays much like the Pacifist version with humans and monsters taking turns to act on each other and the same rules for hits on humans and saving. However, during the humans’ turn, the humans will confer and choose a monster to kill. The humans will call the monster into the smaller space between the center line and the line in the monsters’ territory and send one human to battle them with half a pool noodle and as many of the monsters’ thrown items as they choose to gather. The attacking human comes to the center line and attempts to hit the monster with either the items or the pool noodle; the monster may dodge, but they may not leave the smaller box until the humans’ turn is up. The human only needs to hit the monster once to kill them, and if they succeed, the monster leaves the game and the humans’ turn ends. If the monster survives until the end of the humans’ turn, they return to their side of the field and the human is given time to retreat from the center line. The game ends when either all of the humans or all of the monsters are out of the game.
My Puzzles Are Very Fair: Enjoy a fine tradition of monster culture and invite your guests to solve some puzzles. For this relaxing activity, play a few logic- or strategy-based board games like Clue, Seven Wonders, Risk, Scrabble, or Chess. You can also offer some single-player games like mazes, Sudoku puzzles, crosswords, and word searches for guests to do together or compete to finish. Also consider designing your own environment-based puzzle outdoors or in a large indoor space. The kind of floor-based puzzles in Undertale are difficult to recreate or solve outside of 2D views, but you can create an environment puzzle where guests solve riddles or logic puzzles to collect items on a scavenger hunt list or race to a location. For example, one puzzle might have guests use clues and colored blocks with place names written on them to build a structure in a specific pattern; if they build the structure correctly, another clue will point out the box with the correct location for their next puzzle, but if the boxes are in the wrong places, the clue will send them somewhere else. Try taking inspiration from classic logic conundrums and camp or team-building games to help you start thinking in puzzles and use a little creativity to bring them to life. Or you can just put a bunch of rocks upstream of the route to Waterfall.
If you use any of these ideas for your own Undertale party or come up with new ones, please send us a message! We’d love to hear about your celebration.
All game images were created by and belong to Toby Fox.