Games like Dead by Death
Games like Dead by Death include Hollow Knight, Bloodstained: Ritual of the Night, Dust: An Elysian Tail, Rogue Legacy 2, and Hollow Knight: Silksong. We matched them by the tags players give Dead by Death on Steam (Indie, Action, Adventure, RPG, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Indie · Platformer · Metroidvania

Bloodstained: Ritual of the Night
Shared: Action · RPG · Adventure

Dust: An Elysian Tail
Shared: Action · Indie · RPG

Rogue Legacy 2
Shared: Action · Indie · Adventure

Hollow Knight: Silksong
Shared: Indie · Metroidvania · 2D

UnEpic
Shared: Indie · RPG · Action

ICEY
Shared: Action · Indie · Adventure

Rogue Legacy
Shared: Indie · Action · Platformer

Skul: The Hero Slayer
Shared: Indie · Action · 2D

The Vagrant
Shared: Action · RPG · 2D

Dungeon Munchies
Shared: Indie · Action · Adventure

Salt and Sanctuary
Shared: 2D · Action · RPG

Touhou Luna Nights
Shared: Side Scroller · Metroidvania · Platformer

Gato Roboto
Shared: Indie · Action · Adventure

Blasphemous
Shared: Indie · Metroidvania · 2D

Bloodstained: Curse of the Moon
Shared: Action · 2D · Platformer

Shovel Knight: Treasure Trove
Shared: Indie · Platformer · Adventure

Monster Boy and the Cursed Kingdom
Shared: Action · Indie · Adventure

Nine Sols
Shared: Action · 2D · Metroidvania

Valdis Story: Abyssal City
Shared: Action · Indie · RPG

Axiom Verge
Shared: Indie · Action · Metroidvania

Deaths Gambit: Afterlife
Shared: RPG · Action · Indie

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · Metroidvania · 2D

Ori and the Will of the Wisps
Shared: Action · Adventure · Platformer