Game Tips - Undertale | gameskill.top

Game Tips Guide

This guide provides a comprehensive collection of tips for Undertale, organized by category. Whether you are a first-time player or a seasoned veteran looking for hidden secrets, these strategies will help you navigate the Underground with confidence.

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Beginner Tips

Listen to Flowey’s ‘friendly’ tutorial, but be wary. Toriel’s advice is much more trustworthy. Flowey will try to trick you—pay attention to the game’s themes of choice and consequence from the start.

Save often. Saving is available at star-shaped save points. You can save manually by interacting with them. This is crucial before bosses or difficult encounters.

Examine everything. Talk to every NPC, read signs, and inspect objects. Undertale hides lore, jokes, and hints everywhere.

Don’t spam the ‘Fight’ button. The battle system is turn-based, so take your time to read enemy dialogue and consider your options (Act, Mercy, Item, etc.).

Learn the bullet patterns. Each enemy has unique attack patterns. Practice dodging; the heart (your soul) moves slowly at first, but you can predict patterns after a few attempts.

Mercy is a valid option. You don’t have to kill anyone. Use ‘Spare’ or ‘Act’ to pacify enemies, especially if you aim for a Pacifist route.

Combat Tips

Use the ‘Act’ command wisely. Each enemy has specific actions that can lower their HP without fighting. For example, complimenting or flirting with certain monsters can make them tired or calm. Experiment!

Check enemy stats. Use the ‘Check’ option (under Act) to see enemy ATK, DEF, HP, and hints. Knowing their weakness is half the battle.

Item usage in battle is free. You can use items without ending your turn. Healing items like Monster Candy or Spider Donuts can save you during long fights.

Defense matters. Some items and equipment boost DEF, reducing damage. Equip the best armor you can find.

Mercy doesn’t always work instantly. If an enemy’s name is yellow, you can Spare them. If not, you must Act first to make them calm (e.g., ‘Tickle’ for Papyrus, ‘Joke’ for lesser dogs).

Toriel: If you want to spare her, don’t attack. Keep using ‘Spare’ or ‘Act’ (talk, etc.) until she stops fighting. This is the first test of your mercy.

Papyrus: Use ‘Act’ > ‘Joke’ or ‘Flirt’ to make him drop his guard. When his name turns yellow, Spare him. He will eventually give up.

Undyne (Pacifist): After a certain point, keep running away (use the ‘Spare’ option repeatedly) or ‘Act’ > ‘Flirt’ (but only after the date). Use healing items.

Mettaton EX: Use ‘Act’ > ‘Boast’ or ‘Flex’ to raise his ratings. When he’s emotional enough, you can ‘Spare’ him. Keep the fight entertaining.

Sans (Genocide route): The hardest boss. Memorize his attack patterns—he uses karmic retribution (poison damage). Learn to dodge blue bones and moving platforms. Use the best equipment (Sea Tea to speed up). Save often before him.

Asgore (Neutral route): His attacks are powerful. Use the ‘Fight’ command sparingly; he can be pacified after lowering his HP to a certain point, but it’s tricky. Use high-defense items like the Cowboy Hat.

Exploration Tips

Check every room thoroughly. Hidden nooks often contain items, secrets, or NPCs. For example, the hidden room in the Ruins with a moss bed (heals you).

Interact with objects multiple times. Some items only appear after a second interaction, like the mysterious door in Waterfall that opens after talking to the clam girl.

Talk to NPCs after major events. Their dialogue changes frequently, revealing story details and side-quests.

Try to backtrack. After obtaining a new ability (like the cell phone from Sans), revisit earlier areas. You might find new interactions or shortcuts.

Pay attention to the environment. Color changes (e.g., purple in Waterfall) indicate danger or special mechanics. The green shimmer in certain rooms signals a hidden path.

The Cell Phone is your best friend. Use it to call Papyrus or Sans for tips, jokes, or even puzzle hints.

Resource Management

Don’t hoard too much. You can carry up to 8 items. Balance healing items with key items. Sell excess to Tem Shop for gold.

Monster Candy: Free and available early—grab it. It heals 10 HP.

Spider Donut/Bug: Heal 12 HP. Buy from the spider bake sale in Ruins or Hotland. The donut is cheaper.

Sea Tea: Heals 10 HP but also increases your speed for the fight—very useful for dodging.

Legendary Hero: Heals 40 HP, found in Alphys’s lab. Save for tough boss fights.

Instant Noodles: Heals 15 HP but only if eaten in battle; outside, it does nothing special.

Gold is used to buy items and upgrade equipment. Earn gold by defeating monsters (if you kill), selling items, or finding it.

Tem Shop sells rare items cheaply. But be careful—the price might be higher if you’re rich.

Sell equipment you no longer need. The shop in Snowdin town buys weapons/armor.

Donate gold to the beggar in Hotland? He rewards you with a nice item later.

Weapons and armor affect your stats. The ‘Torn Notebook’ and ‘Faded Ribbon’ are decent starting gear. Sell them later for better.

The ‘Burnt Pan’ (found in Hotland) increases healing item effectiveness by 1-2 HP—great for longer routes.

The ‘Cowboy Hat’ gives high DEF but doesn’t reduce karma damage; use it for physical fights.

The ‘Locket’ is a sentimental item, but also good for defense.

Weapon choices: ‘Worn Dagger’ (better ATK) vs. ‘Toy Knife’ (lower ATK but boosts invincibility frames).

Puzzle Solving Tips

Most puzzles are optional. If you can figure out the solution, great. If not, often there is a simpler way (e.g., walking around the colored tile grid in Snowdin).

Read the instructions. Usually a sign or NPC gives the solution. Pay attention to color sequences.

Use the ‘Red’ heart color to your advantage. In puzzles involving colored switches, your soul’s color might affect which ones you can interact with.

In Waterfall, the echo flowers give clues. Stand near them and wait for hints.

The flower puzzle in the Ruins: Follow the same pattern as the door in the previous room (hint: walk into the 4th flower from the left, then 2nd, etc.).

Don’t force solutions. If stuck, try ‘Act’ on environment objects—sometimes you can trick them.

Dialogue and Choices

Choices are permanent. Every fight, every conversation can affect the ending. Keep multiple save files if you want to explore different routes.

Sparing enemies is key for Pacifist route. You must not kill a single monster. Use ‘Mercy’ and ‘Act’ to pacify them.

Killing certain characters changes the story. For example, killing Papyrus results in a very different dialogue from Sans later.

Flirt with everyone? In Pacifist, flirting can calm some enemies, but it can also backfire (e.g., with Undyne).

The True Lab is accessible only on a Pacifist route after completing the final boss. Go through Alphys’s lab to unlock the true ending.

Genocide route requires eliminating all monsters in each area. This is a deliberate, grim path. Be warned—it permanently alters the game’s ending.

Secrets and Hidden Content

The Annoying Dog. A white dog appears occasionally. If you interact, you might get items or a special fight. Try using a specific key item (like the Dog Residue) on it.

Mystery Man in Hotland—talk to him multiple times for a unique dialogue chain.

The Gray Door in Waterfall leads to a secret area with a fountain that restores HP and a hidden boss—only accessible after certain conditions.

Amalgamates in the True Lab—don’t fight them; use ‘Act’ to calm them for unique scenes.

Feedback from Sans can be hilarious—call him at specific moments or after certain bosses for cryptic comments.

The secret bosses: Gaster followers appear rarely; one is hidden outside a save point in Hotland. Talk to them for lore.

Fun values: The game has hidden events triggered by “Fun” values in your save file. These can be manipulated for rare encounters (e.g., Wrong Number Song).

Route-Specific Optimization

Reset after beating the game once? No need—you can reload a save before Asgore to go back and complete all prerequisites (befriending Papyrus, Undyne, Alphys).

Befriending Undyne: After her boss fight, go back to her house in Waterfall. Deliver a letter from Papyrus, then go on a date with her (via Papyrus’s secret call).

Befriending Alphys: After delivering the letter, head to Alphys’s lab in Hotland. She will ask for help with her Anime Club—agree, then visit the True Lab.

Sparing Asriel: The final boss is a bullet-hell gauntlet. Memorize patterns—especially the hyper-gauntlet at the end. Use healing items like Legendary Hero and Quick Hander for speed.

Kill selectively to see different endings. Try killing only Papyrus, or only Mettaton, to see unique phone calls at the end.

Save before the final boss (Asgore). You may need to reload to see different epilogue outcomes.

Don’t kill Toriel? She can be spared easily. Killing her changes the mood significantly.

Grind efficiently. In each area, you must kill a specific number of random encounters before the area boss appears. Count your kills via the “Save” point (it shows kill count).

Save your strongest items. The Sans fight requires maximum healing. Use the Instant Noodles (heals more in battle) and Sea Tea for speed.

Dodge patterns are key. Sans’s attacks are predictable once you practice. Focus on moving in small circles and anticipating blue bones.

The final boss (Asriel? No, Chara.) After Sans, the final boss is Chara—you can’t win; it’s a scripted ending.

Never spare Sans. It’s impossible; you must attack every turn until his HP reaches 0. Use the “Sans” dialogue as a chance to heal (when he speaks, you can use items).

Advanced Tips & Tricks

Weapon swapping mid-battle. You can open the item menu and change your weapon without losing a turn. Useful for adapting to enemy defenses.

Karma damage (blue items). Some weapons apply karmic retribution (poison). This only works in Genocide route against Sans, but know that it exists.

Invincibility frames. After getting hit, you are briefly invincible. Use this to dash through dense bullet clouds.

Soul colors matter. Red soul: normal. Blue soul: you only move in colored blocks. Green soul: you heal over time but are stationary. Purple soul: you must move in a set path. Understand these to master fights.

Mercy threshold. Some enemies can be spared when their HP is low but not zero. Check their expressions—they might look tired or scared.

No leveling? In a Pacifist run, you can stay LV 1. This makes the game harder, but it’s possible. Evade everything.

Backup save files. Before major decisions (like killing a character), copy your save file from the %LocalAppdata% folder to try different outcomes.

Economy and Item Optimization

Sell excess equipment to the shop in Snowdin (the shopkeeper with glasses) or to Tem Shop in Hotland. Tem Shop pays less but sometimes offers exclusive items.

Save healing items for bosses. In exploration, only use minor heals (Monster Candy) to top off HP. Save Legendary Hero and Instant Noodles for Mettaton EX or Sans.

Weapon trade-offs: The ‘Burnt Pan’ gives +1 to healing items. The ‘Tough Glove’ has high ATK but no extra effects. Choose based on route: for Pacifist, the Pan is better; for Genocide, the Glove.

Buy the Secret Item from the mysterious traveler in Waterfall (the clam girl) – it’s a key to the hidden room.

The ‘Real Knife’ and ‘The Locket’ are only available in Genocide route. They offer extreme stat boosts but come at a narrative cost.

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Final Words

Undertale is a game about empathy and consequence. The tips above will help you survive, but the true reward lies in the story you weave. Whether you choose to be a pacifist, a neutral wanderer, or a destroyer, remember: your actions matter. And above all—stay determined.