Board Thread:General Discussion/@comment-26006155-20190617222636/@comment-39483612-20190623053634

also i believe deltarune is the ending sans originally wanted. Judging by the info shown earlier, it is an alternate universe that is ahead of undertale. I think gaster was never corrupted in that timeline and therefore the dark experiment never happened. Instead, their plan to find a timeline where the barrier never existed succeeded but something happened to gaster. I read a theory about gaster being the knight from deltarune meantioned by jevil, and i think that ties in well with the dark world being gasters experiment. Perhaps the thing that corrupted gaster in the alpha timeline (i think it was alpha, the one sans fixed) corrupted him later. In this timeline. I believe at the start, the gaster that travelled with sans was the first one speaking (the one who isn’t corrupted because of a change of events) and the second one that shows up was the recently corrupted one.

I’m sure you guys will disprove this but it makes sense to me