Looking for logging into the Undertale site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Undertale site. After that you can login as usual with your login credentials.
https://undertale.com/
https://aminoapps.com/c/undertale/page/user/login/3jWS_MfgBK7kRWo75eeMZe16ZpW2oaw
https://aminoapps.com/c/undertale-espanol/
https://www.rollapp.com/app/undertale
https://store.steampowered.com/app/391540/Undertale/
https://steamcommunity.com/app/391540
https://www.roblox.com/games/2415265251/undertale-sans-simulator?rbxp=693873456
https://www.fangamer.com/collections/undertale
https://www.eurogamer.es/games/undertale
https://www.eurogamer.es/articles/2018-03-08-undertale-tambien-llegara-a-nintendo-switch
https://www.eurogamer.es/articles/volviendo-a-undertale-articulo
https://twitter.com/tobyfox/status/1057256452316901376?lang=es
https://www.webtoons.com/en/challenge/undertale-i-wish-to-become-a-human/list?title_no=238324&page=1