Games like King Lucas
Games like King Lucas include Hollow Knight, Hollow Knight: Silksong, Ori and the Will of the Wisps, SANABI, and Skul: The Hero Slayer. We matched them by the tags players give King Lucas on Steam (Indie, Action, Adventure, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · 2D

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

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

SANABI
Shared: Action · Adventure · Indie

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

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

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

Nine Sols
Shared: Action · Platformer · 2D

The Messenger
Shared: Platformer · Retro · Indie

Gato Roboto
Shared: Indie · Action · Adventure

Axiom Verge
Shared: Indie · Platformer · Action

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

Rogue Legacy 2
Shared: Action · Indie · Platformer

Tomb Raider Game of the Year
Shared: Action · Adventure · Singleplayer

Constance
Shared: Action · Platformer · Indie

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Adventure

Broforce
Shared: Action · 2D · Indie

Dead Cells
Shared: Adventure · 2D · Metroidvania

UnEpic
Shared: Indie · Action · Platformer

Iconoclasts
Shared: Indie · Action · Adventure

Celeste
Shared: Indie · Platformer · 2D

Sonic Mania
Shared: Platformer · 2D · Retro

Out There Somewhere
Shared: Indie · Platformer · Adventure

Bloodstained: Curse of the Moon
Shared: Action · Platformer · Retro