The release date is 2015/01/01 which seems to make it older than Undertale

If by any chance you have an older version of the mod pre-2.1 it'll be appreciated to be uploading it to the patch part of the resources tab so older versions are still playable

so my run at https://www.speedrun.com/Undertale_Red__Yellow/runs/zx5gpjkm has been rejected because the mod tought it was a duplicate well if you look closely i'm submitting the neutral glitchless part of the run (in deltarune src term this is like someone submitting a chapter 1 run even tough it's part of an all chapters run or in undertale src term this is like someone submitting a ruins il even tough it's a full run)

i'm actually really curious do to now deltarune using seperate data.win for all of the chapters and the chapter select can you edit the ch select data.win and not get your run voided?

True Pacifist% which is you don't kill anyone and progresses trough LV1 and always have 0 EXP.