Entirely new soundtrack, unique locations, and multiple endings. 2. TS!Underswap A "re-imagining" of the Swap AU (Alternate Universe).
Start with Undertale Yellow on Itch.io. It is the closest thing to a sequel we will ever get, and it runs brilliantly on a restricted network. undertale fan games unblocked extra quality
A save point appeared. It wasn't a yellow star. It was a flashing "Save" icon from Windows 98. Entirely new soundtrack
If you have access to a computer at home with unrestricted internet, this is the best way to get "Extra Quality." undertale fan games unblocked extra quality