Today was the 5th anniversary of TS!UNDERSWAP Demo v1.0! It's amazing to think we've gotten this far -- in just January, it'll be the 2nd anniversary of v2.0! We've been making some neat progress lately, and just brought on 4 new team members! Let's hope that 2026 is a good year for development!

crucified koffin k #tsunderswap

crucified koffin k #tsunderswap

Drew Koffin K and the Boogiemen cause yes #tsunderswap #underswap #undertale #boogiemen #koffink #larry #harry #harryunderswap #larryunderswap #koffinkunderswap #ts!underswap

been awhile since ive posted hwre have some koffelle #tsunderswap #yumeship

been awhile since ive posted hwre have some koffelle #tsunderswap #yumeship

HEAR ME OUT

Here's a sneak peak of a future update! All of the Boogiemen's new battle sprites are finished and implemented in-game -- all we have to do is polish things up, fix some issues, and manually backport everything from the Demo v3.0+ branch to Demo v2.0's. Then, the new music... and it's good to go!

The bats (are trying to) say he's evil, so it must be true #TS!US #fanart

day 104 of drawing koffin-k daily? until ts!underswap fully releases: deltarune today #tsunderswap #deltarune

koffelle ship chart :3 #tsunderswap #undertale #yumeship

koffelle ship chart :3 #tsunderswap #undertale #yumeship

just realized i never posted da full thing here uhhhhhs have my husband #tsunderswap #undertale #koffink

just realized i never posted da full thing here uhhhhhs have my husband #tsunderswap #undertale #koffink

day 101 (of drawing koffin-k daily? until ts!underswap fully releases): thanks ibis paint x #tsunderswap

my voice is creaky af rn

day 99 (of drawing koffin-k daily? until ts!underswap fully releases): redraw of a post from tumblr :P #tsunderswap

WERE SO CLOSE AUUFHHBHHJNJ

They only reported 1 bug yesterday (we've received over 500 individual reports since we started testing Chapter 3 PC) Feels like they're slurping the last drops of soda from between the ice cubes now

#art #undertaleyellow clover if they darked on that world

erm what da koffigma #tsunderswap #wip

happy (late?) valentines <3 #yumeship #ts!underswap #undertale

gooning up a storm rn

happy (late?) valentines <3 #yumeship #ts!underswap #undertale

Homies (& Flowey) #tsunderswap #underswap #koffink #underswapchara #tsunderswapchara

gonna try and start using this website more,,, twitter kinda sucks

selfship art with koffin k ;_; #tsunderswap #undertale #yumeship #yumeshipping

selfship art with koffin k ;_; #tsunderswap #undertale #yumeship #yumeshipping

bluesky fucking sucks why do i even use it

Gam Gam-K #tsunderswap

zenith koffin k GO‼️‼️ (idea by @/wise_vicee on twt) #undertale #tsunderswap

zenith koffin k GO‼️‼️ (idea by @/wise_vicee on twt) #undertale #tsunderswap

you can tell shes karry because shes caring #tsunderswap #undertale

you can tell shes karry because shes caring #tsunderswap #undertale

save me #TSunderswap ... save me #undertale

save me #TSunderswap ... save me #undertale

merry (late) noellemas :3 #DELTARUNE #noelleholiday

merry (late) noellemas :3 #DELTARUNE #noelleholiday

snowman dance but corn yaoi #undertaleyellow

when memories snow #noelleholiday #deltarune #deltarunenewsletter

when memories snow #noelleholiday #deltarune #deltarunenewsletter

get hit with rhe #tsunderswap doodles ‼️ #undertale #underswap

get hit with rhe #tsunderswap doodles ‼️ #undertale #underswap

small chara doodle #undertale #tsunderswap

small chara doodle #undertale #tsunderswap

#tsunderswap #undertale

#tsunderswap #undertale

dead ass thought this was noelle for a sec 💔