r/UndertaleAU is a subreddit with 13k members. The community frequently discusses au, sans, undertale, art, and dusttale, and the most common flair used is ✧˖°.art⋆˙⟡, ✧˖°.my au⋆˙⟡, ✧˖°.au discussion⋆˙⟡, ✧˖°.memes⋆˙⟡, and ✧˖°.au debate⋆˙⟡.
❤️A place for Undertale and its various AUs. Separate from Deltarune.❤️
Popular Topics in r/UndertaleAU
#1
Au
119 posts
#2
Sans
88 posts
#3
Undertale
64 posts
#4
Art
29 posts
#5
Dusttale
14 posts
#6
Oc
13 posts
#7
Echotale
13 posts
#8
Core Frisk
13 posts
#9
Mafiatale
12 posts
#10
Character
11 posts
Flair Used in r/UndertaleAU
#1
✧˖°.Art⋆˙⟡
: "Very Important Question..."
83 posts
#2
✧˖°.My AU⋆˙⟡
: "[OC] VERSE!CHARA // I won't give up. ("comic") (spooky blood warning oh no blood blood!!! blood...)"
38 posts
#3
✧˖°.AU Discussion⋆˙⟡
: "How exactly does Horror's Immortality work?"
23 posts
#4
✧˖°.Memes⋆˙⟡
: "Clover falling into HorrorTale and Sans trying to explain the situation"
10 posts
#5
✧˖°.AU Debate⋆˙⟡
: "Ngl I wonder how certain people years ago thought DUSTTALE Sans VS UNDERTALE Sans was even a question."
5 posts
#6
✧˖°.AU Trio⋆˙⟡
: "Does the Murder Time Trio have an actual "canon" or any real lore to speak of?"
4 posts
#7
✧˖°.AU Interactions⋆˙⟡
: "Do You Think Error Sans Can Solo The Delatrune Verse?"
4 posts
#8
✧˖°.Merch⋆˙⟡
: "Murder Time Trio Charm Preorders!"
1 post
#9
✧˖°.AU Lore⋆˙⟡
: "So ah what is the lore behind shiftdust *swap* asriel"
1 post
#10
✧˖°.Music⋆˙⟡
: "NEW EEEEETO DROPPED"
1 post
Member Growth in r/UndertaleAU
Yearly
+5k members(62.8%)
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Last updated: September 3, 2026