Games like Lion Quest
Games like Lion Quest include Celeste, Hollow Knight, Ori and the Will of the Wisps, SANABI, and Hollow Knight: Silksong. We matched them by the tags players give Lion Quest on Steam (Platformer, 2D, Action, Singleplayer, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Platformer · 2D Platformer · 2D

Hollow Knight
Shared: Platformer · 2D · Singleplayer

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

SANABI
Shared: Action · 2D Platformer · 2D

Hollow Knight: Silksong
Shared: 2D · Platformer · Singleplayer

Super Meat Boy
Shared: Platformer · 2D · 2D Platformer

Rogue Legacy 2
Shared: Platformer · Action · Arcade

LIMBO
Shared: Platformer · 2D · Indie

Planet of Lana
Shared: Action · Platformer · 2D Platformer

Webbed
Shared: 2D Platformer · 2D · Cute

Dust: An Elysian Tail
Shared: Platformer · Action · 2D

Rain World
Shared: Platformer · 2D · Indie

VVVVVV
Shared: Platformer · 2D Platformer · 2D

Geometry Dash
Shared: 2D · Platformer · Singleplayer

Broforce
Shared: Action · 2D · Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Singleplayer

Downwell
Shared: Platformer · Action · 2D Platformer

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

Mark of the Ninja
Shared: Platformer · 2D · Action

Rayman® Legends
Shared: Platformer · Action · 2D

Sonic Origins
Shared: Action · 2D Platformer · Platformer

MO:Astray
Shared: Action · Platformer · Adventure

Katana ZERO
Shared: Action · Platformer · 2D Platformer

Sonic Superstars
Shared: Platformer · Action · 2D Platformer