Undertale: Judgement Day (Roblox) Wiki
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Underfell is an Au where monsters don't have mercy for humans. It has stronger language than Undertale, so be careful if you play a game of it. Not to be mistaken for Hardtale! Sans. Fell! Sans is the Sans from Underfell ( https://undertale-au.fandom.com/wiki/Underfell).

Many of his attacks are just stronger versions of Sans's attacks.

"its a terrible day outside"

"plants are dying, monsters are hiding"

"on these days, kids like you"

"are gonna have a GREAT time!"

-beginning of round Music: THEOVANIA by Beny1C03

Attacks Information Cool Down Special Effects
Bone Throw Throws 10 red and orange bones wherever the player is facing and deals 4 damage per hit 5 Seconds KR
Fell Bone Attack Summon a lot of orange or red bones in separate lines of bones that come from the sides of the corridor and deals 8 damage per hit 120 Seconds KR/ orange means to move if caught in attack
Gaster Blaster A creature with a red glowing eye appears and shoots a red beam wherever the Sans clicked and deals 2 damage per hit 5 Seconds KR
Great Time blasters Many gaster blasters appear in a large circle and aim toward the middle (the place where the Sans clicked and do 2 damage per blaster per hit 4 Seconds KR
Force Sends every person the Chara team away from the Sans 16 Seconds None
bone zone summon a red square that will fill with bone after 1 second and deals 3 damage per hit 8 seconds KR

Death cutscene

Sans: guess that's it then, huh.

Sans: ...

Sans: well i'm going to grillby's. (Fade to dust)


All the former attacks of Fell! Sans's attacks were just stronger versions of Sans attacks.

Music: THEOVANIA by Beny1C03

Attacks Information Cool Down Special Effects
Bone Barrage Throws 10 red and blue bones wherever the player is facing 5 Seconds KR
Fell Bone Attack Summon a lot of blue or red bones in separate lines of bones that come from the sides of the corridor 120 Seconds KR/ Blue means to not move if caught in attack
Gaster Blaster A creature with a red glowing eye appears and shoots a red beam wherever the Sans clicked 5 Seconds KR
Quad Blaster 4 Gaster Blasters come in and shoot red beams in the form of a plus sign and aim toward the middle (the place where the Sans clicked) 4 Seconds KR
Force Sends every person the Chara team away from the Sans (does 1 damage) 16 Seconds None


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