Huh. I wasn't all that surprised when I didn't see DELTARUNE on GOG- most games do not end up here, despite everyone's best efforts. Perhaps, I reasoned, tobyfox doesn't know about GOG, or they signed on as an Epic-Store exclusive, or maybe they just love DRM. But no, tobyfox trusted GOG with his first masterpiece and there is no reason for them not to do the same for their second game.
As much as I would love to see where this game takes me, I'm not buying it until they release it here.