Undertale is over a decade old but still inspires twisty fan theories and heated speculation to this day. And as if the last 10 years of wild theorizing wasn't enough, the game's official 10th anniversary stream decided to send fans spiralling further by including new areas and changes to the original indie hit that might just connect it to Deltarune even closer.
In Fangamer and developer Toby Fox's anniversary marathon stream, fans were quick to spot some sights that weren't exactly familiar. For one, there was an entirely new, moody area full of ruins. Then, even more weirdly, Gaster's super rare door which only unlocks under very specific conditions is in full color in the stream rather than its usual monochrome appearance.
