Undertale icon

Undertale (NSP, XCI) ROM + v1.0.2 Update

Undertale SWITCH ROM - The renowned indie RPG, is now available on Nintendo Switch! Descend into the underworld and delve into a charming and amusing world brimming with perilous creatures.

App Name Undertale
Genres Role-Playing
Realese Year 2018
Image Format NSP
Region USA
Latest Version 1.0.2
Language English, Japanese
Required Firmware 6.2.0
File Size 172MB

Undertale is a 2015 2D role-playing video game created by American indie developer Toby Fox. The player controls a child named Frisk who has fallen into the Underground: a large, secluded region under the surface of the Earth, separated by a magical barrier. The player meets various monsters during the journey back to the surface, although some monsters might engage the player in a fight. The combat system involves the player navigating through mini-bullet hell attacks by the opponent. They can opt to pacify or subdue monsters to spare them instead of killing them. These choices affect the game, with the dialogue, characters, and story changing based on outcomes.



Undertale is a role-playing game that uses a top-down perspective. In the game, the player controls a child and completes objectives to progress through the story. Players explore an underground world filled with towns and caves and are required to solve numerous puzzles on their journey. The underground world is the home of monsters, many of whom challenge the player in combat;[5] players decide whether to kill, flee, or befriend them. Choices made by the player radically affect the plot and general progression of the game, with the player’s morality acting as the cornerstone of the game’s development.

When players encounter enemies in either scripted events or random encounters, they enter a battle mode. During battles, players control a small heart which represents their soul and must avoid attacks unleashed by the opposing monster similar to a bullet hell shooter. As the game progresses, new elements are introduced, such as colored obstacles, and boss battles which change the way players control the heart. Players may choose to attack the enemy, which involves timed button presses. Killing enemies will cause the player to earn EXP (in turn increasing their LOVE) and gold.


They can use the ACT option to check an enemy’s attacking and defending attributes as well as perform various other actions, which vary depending on the enemy. If the player uses the right actions to respond to the enemy or attacks them until they have low HP (but are still alive), they can then choose to spare them and end the fight without killing them. For some boss encounters to be completed peacefully, the player is required to survive until the character they are facing has finished their dialogue. The game features multiple story branches and endings depending on whether players choose to kill or spare their enemies; and as such, it is possible to clear the game without killing a single enemy.

Monsters will talk to the player during the battle, and the game will tell the players what the monster’s feelings and actions are. Enemy attacks change based on how players interact with them: should players choose non-violent options, enemy attacks are easy, whereas they become less easy if players choose violent options. The game relies on several metafictional elements in both its gameplay and story. When players participate in a boss battle on a second playthrough, the dialogue will be altered depending on actions in previous playthroughs.



Undertale is set in the Underground, a realm where monsters were banished after war broke out with humans. The Underground is sealed from the surface by a magic barrier with a singular gap at Mount Ebott. In the year 201X, a human child falls into the Underground from Mount Ebott and encounters Flowey, a sentient flower who teaches the player the game’s mechanics and lies about “LV”, or “LOVE”, in an attempt to kill them. The human is rescued by Toriel, a motherly goat-like monster, who teaches them how to survive conflict in the Underground without killing. She intends to adopt the humans, wanting to protect them from Asgore, the king of the Underground.

The human eventually leaves Toriel to search for Asgore’s castle, which contains the barrier to the surface world. They encounter several monsters, such as the skeletons Sans and Papyrus, two brothers who act as sentries for the Snowdin forest; Undyne, the head of the royal guard; Alphys, the kingdom’s royal scientist; and Mettaton, a robotic television host Alphys created. Most of the monsters are fought, with the human choosing whether to kill them or to spare and possibly befriend the monster. During their travels, the human learns that many years ago, Asriel, the son of Asgore and Toriel, befriended the first human who fell into the Underground.


When the child abruptly died, Asriel used the child’s soul to pass through the barrier, intending to return the body to the surface. The humans living there attacked and killed Asriel, causing Asgore to declare war. In the present day, Asgore has collected six souls from fallen humans, of which he needs one more to destroy the barrier. The game’s ending depends on how the player handles encounters with monsters. If the player completes a playthrough without killing any monsters (or kills some but not all of the monsters) they experience the “Neutral” ending.

The human arrives at Asgore’s castle and is forced to fight him. Sans stops the human before their confrontation, revealing that the human’s “LOVE” and “EXP” are acronyms for “level of violence” and “execution points”, respectively. Sans judges the humans based on their accumulated “LOVE” and “EXP”. The human then fights Asgore, but Flowey interrupts, killing Asgore and stealing the human souls. With the help of the souls, the human defeats Flowey and leaves the Underground. They then receive a phone call from Sans, detailing the state of the Underground after the human’s departure, with the specifics depending on who was killed or spared.


If the player kills no monsters before completing a “Neutral” ending, they can reload their saved game to complete the “Pacifist” ending. Flowey is revealed to be a reincarnation of Asriel accidentally created by Alphys’s experiments. During the fight with Asgore, Toriel stops the battle and is joined by the other monsters the human befriended. Flowey ambushes the group, absorbing the souls of all the humans and monsters to take an older Asriel’s form. During the ensuing fight, the human manages to connect with the souls of their friends, and eventually defeats Asriel: He reverts to his child form, destroys the barrier, and expresses remorse for his actions before leaving, revealing the human’s true name as Frisk.

The human falls unconscious and is awoken to see their friends surrounding them. The monsters peacefully reintegrate with the humans, while the human has the option of accepting Toriel as their adoptive mother. A third ending, known by fans as the “No Mercy” or “Genocide” ending, ensues if the player kills every single monster in the game that can be fought. This involves continuously triggering random encounters in each area until no more monsters remain. Going down this route changes many aspects of the game: the game’s soundtrack becomes more ominous by playing at a lower speed and pitch, and most NPCs are absent from the Overworld as they evacuate to escape from the player’s rampage.


The few remaining characters that can be interacted with have changed dialogue, reflecting the impact the player’s actions are having on the game’s world. When the human reaches Asgore’s castle, Sans attempts to stop them, but fails and is slain. Flowey kills Asgore in an attempt to obtain mercy but is killed by the human. Chara, the first fallen child who befriended Asriel, then appears and erases the world. To enable further replays of the game, the player must give their soul to Chara, restoring the universe and causing a permanent alteration to the Pacifist ending.

Undertale (NSP, XCI) ROM + v1.0.2 Update Download


You are now ready to download Undertale for free. Here are some notes:

  • Please read our MOD Info and installation instructions carefully for the game & app to work properly
  • Read the FAQ carefully for more details
  • Kindly report any broken, dead, incorrect, or missing links in the comment section.
  • Additionally, if you have any specific game requests, feel free to leave a comment, and I will do my best to add it within 24 hours. Your feedback is highly appreciated!
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