Is Deltarune related to Undertale?

Related questions

1. What does EXP mean in Undertale?
2. What is Outertale?
3. How tall is sans Undertale?
4. Will there be a Chapter 2 of Deltarune?
5. Is Undertale and Deltarune related?
6. What is sans's last name?
7. Is WD Gaster a skeleton?
8. Does Xbox have Deltarune?
9. What is Underfell?
10. Is Toby Fox his real name?

Tags

1. #according
2. #deltarune
3. #lived
4. #events
5. #characters
6. #notably
7. #lives
8. #specifically
9. #actually
10. #story
11. #different
12. #undertale
13. #affect
14. #world