There isn’t a confirmed GB file size for Deltarune Chapter 5 in the sources I found. The closest public clues are fan discussion, which only suggests Chapter 5 may be around 1 GB or more , but that is speculation, not an official number.

What’s known

  • The official Steam page says DELTARUNE has Chapters 1–5 available now, but it does not list a per-chapter install size.
  • A fan discussion from 2025 notes Chapters 1 and 2 together were about 184 MB, which is why some people guessed later chapters could push the total close to 1 GB.
  • Reddit posts in June 2026 are mostly still guesses, with no verified file-size figure for Chapter 5 alone.

Practical estimate

If you just want a rough expectation, Chapter 5 is probably not a huge download by modern game standards. Based on the chatter, a safe guess would be hundreds of MB, possibly approaching 1 GB , but that’s only an estimate.

TL;DR

No official GB size is confirmed yet for Chapter 5, and current public discussion is still speculative.