Hello guys, and welcome to the

Undertale Green Winter Devlog 2026!

And we're starting this devlog with...

Code!

(what we implemented is shown in the video)

Since January 2026, a significant amount of work has been done on the code (despite numerous rewrites)

Here's what we did:

Walking

Running

Transitions

All rooms in the Ruins

All items in the Ruins (but they don't work)

Sounds from Undertale and Undertale Yellow

Title screen (and confirmation via Z/Enter)

Needs to be completed:

*Saves

*Background music in levels

Needs to be implemented:

*Frame changes while running

*Inventory

*Battles

*Castchenes

Okay, let's go to the...

Sprites

These are... Ummm... Sprites for the intro, which will be changed closer to the first demo version. This was done by the artist Omori_Anim

Okay, what else?

Skoopy redesign by the same artist!

( Skoopy is a Snowdin Royal Guard in our game)

A small spider NPC from KisliA little spider NPC from Kislinka, our concept artist and 3D modeler, and...

One of the attacks of the first boss of our game in Dark Ruins from Omori_Anim!

Let's move on to...

Concepts.

Here are two concepts for the enemies, the first from our former concept artist Just an Actor, and the second from our current concept artist Sue!

Well, here's concept art for the stone mini-boss from the author of the first concept enemy.

And here we go to...

Music

RalseiMus created a new track for the intro "Once Upon a Kindness Time", and I with Mindless made new Flowey Theme "It's Me, Flowey!". You can find the latest releases on SoundCloud: https://soundcloud.com/utgreen/ And the track list on Gamejolt will be updated soon!

That's the end of the devlog!

Thanks for reading!

P. S. We may update our information about our game again and put together a separate post with more detailed information. By the way, ask your questions in the comments, we will try to answer them!