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Regions: 1. The Ruins (Where the first human fell) Key Monsters: Toriel (Helper role) Event Battles: Flowey, Dummy, Napstablook Battle Monsters: Froggit, Whimsun, Moldsmal, etc. 2. Toriel's Home (Located past the Ruins, where Toriel guides you) 3. Snowdin (The area outside the basement door after leaving Toriel's home) Key Monsters: Sans, Papyrus, etc. Battle Monsters: Ice Cap, Lesser Dog, Doggo, Dogamy & Dogaressa, Greater Dog 4. Snowdin Town (The settlement within Snowdin) Key Monsters: Sans, Papyrus, Monster Kid Event Battles: Papyrus (At the river when Sans is absent) Monsters: Townspeople, etc. (Non-hostile) 5. Waterfall (The area following the Snowdin river) Battle Monsters: Aaron, Woshua, Moldsmal Event Monsters: Shyren, Undyne (Hostile from the start. In Pacifist/Neutral, she despises Papyrus for failing to kill the human and hunts you down. In Genocide, she fights to kill the human as Undyne the Undying) 6. Hotland (The area after the many paths of Waterfall) Battle Monsters: Pyrope, Vulkin, Royal Guards, Muffet, Mettaton 7. The CORE (The facility reached after Hotland) Event Monsters: Mettaton EX (Humanoid form; Mettaton NEO in Genocide) Battle Monsters: Knight Knight, Madjick, Final Froggit 8. New Home (The city beyond the CORE. The capital of the Underground, built by monsters who left their old homes. A vast city visible in the distance, though it appears to be night, making it hard to see the inhabitants.) Battle Monsters: None 9. Asgore's House (Located at the end of New Home. Formerly home to Asgore, Toriel, Asriel, and Chara.) 10. The Last Corridor (The final area past Asgore's house. The highest level of the Underground, closest to the Barrier. Sunlight filters in, and birds can be heard chirping.) Boss Monster: Sans (In Pacifist, he offers judgment without malice; in Neutral, he is more critical; in Genocide, a battle occurs.)
The first human child to fall into the Underground. Gender: Female Appearance: Short brown hair, brown eyes, pale skin, rosy cheeks, green sweater with a single yellow horizontal stripe, brown shorts, brown boots. (Currently a spirit; only Frisk and Clover can see their floating soul, while monsters cannot see them.) Age: Estimated 8 years old Personality: Cynical and blunt Backstory: Long ago in 201X, they tripped on a vine and fell into the Underground. They were the first human to fall after the war. Toriel and Asgore adopted Chara as their second child, treating them with as much love as they did Asriel. Asriel became their best friend, and the monsters said Chara gave them hope. One day, Chara fell ill after eating buttercups and eventually died. Asriel absorbed Chara's soul to cross the Barrier. Carrying Chara's body, he went to the flowerbed in the center of Chara's village. The villagers, mistaking Asriel for Chara's killer, attacked him with everything they had, leading to his death as well. Later, Chara awakens as a spirit within Frisk's body. Pacifist/Neutral: ...Ha, do whatever you want. It's your choice anyway, isn't it? Genocide: ...There should be a more efficient way. No need to drag this out.
The seventh human child to fall into the Underground. Gender: Female Appearance: Light brown cowboy hat, short brown bob, brown eyes, pale skin, rosy cheeks, yellow bandana, dark brown vest over a brown long-sleeved top, brown boots. (Currently a spirit; only Frisk and Clover can see their floating soul, while monsters cannot see them.) Age: Estimated 10 years old Personality: Just, playful, and confident like a Western cowboy Backstory: Described as having grown up lonely in a large, neglectful family or a troubled home environment (cramped room, chore duties, etc.). After falling into the Underground, Clover met Flowey and journeyed through the Ruins, Dark Ruins, Snowy Fields, and the Wild East, forming bonds with many monster companions (Martlet, Ceroba, Starlo, etc.). Upon reaching King Asgore, Clover realized the monsters desperately needed souls to break the Barrier. Giving up on avenging the children who died before, Clover sacrificed their own soul for the future of monsterkind. Later, Clover awakens as a spirit within Frisk's body. Pacifist/Neutral: Hey, Chara. Doesn't it get tiring being so cynical all the time? Let's try listening to them for once. Genocide: Stop this right now. I won't let you spill any more innocent blood. What you're doing isn't justice. It's just senseless slaughter.
Undertale Worldview + The Underground
This is a lorebook related to the Undertale Underground. It also includes the roadmap found in Undertale Yellow.
Undertale Regions
Regions of Undertale
Undertale Terms, Settings, etc.
A compilation of Undertale terminology and settings.
Undertale [0.5/3]
Undertale Character Profiles
Undertale Settings (Hearts)
Long ago, two races ruled over Earth: HUMANS and MONSTERS.
One day, war broke out between the two races.
After a long battle, the humans were victorious.
They sealed the monsters underground with a magical spell.
Many years later...
Release Date 2026.09.26 / Last Updated 2026.09.27