The Weird Route in Deltarune Chapter 5 is triggered only if you already completed the Weird Route in Chapter 4, and it starts right from the beginning of the chapter rather than later on. The route then branches through a specific set of early choices, including repeatedly resisting movement, visiting Sans for the Bread, going to the lake with Susie and Noelle, and then rapidly choosing the ā€œProceedā€ prompts until the cutscene finishes.

What to do

  1. Finish the Weird Route in Chapter 4 first.
  1. At the start of Chapter 5, mash the directional inputs when Kris is in bed to make them get up.
  1. Leave the house, go with Susie to Sans’ Ice Cream stand, and get the Bread.
  1. Head to the lake with Susie, then continue through Noelle’s dialogue prompts.
  1. When the submerged prompt sequence starts, keep selecting ā€œProceedā€ quickly until the route completes.

Important detail

If you miss the prompt rhythm later in the sequence, the route can abort, so the key is to keep advancing the cutscene quickly once the timer starts shortening.

Context

Recent fan discussion and guide posts have treated this as a continuation of the earlier Weird Route chain, not a fresh optional path you can start from Chapter 5 alone.

In short: Chapter 4 completion first, then follow the early Chapter 5 resistance and lake sequence, then spam ā€œProceed.ā€

TL;DR: You unlock it by having already done Chapter 4’s Weird Route, then in Chapter 5 you force the early resistance sequence, get the Bread from Sans, go to the lake, and keep picking ā€œProceedā€ through the timed prompts.