Games like Stella Gladio
Games like Stella Gladio include Jump King, Celeste, Geometry Dash, Pogostuck: Rage With Your Friends, and Super Meat Boy. We matched them by the tags players give Stella Gladio on Steam (Precision Platformer, Psychological Horror, Difficult, Action, and 2.5D): closest matches first, and among equally close ones the better-known games.

Jump King
Shared: Psychological Horror · Precision Platformer · Difficult

Celeste
Shared: Precision Platformer · Difficult · Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Pogostuck: Rage With Your Friends
Shared: Psychological Horror · Precision Platformer · Difficult

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

SANABI
Shared: Action · Adventure · 2D Platformer

I wanna be the Creator
Shared: Action · Precision Platformer · Difficult

Hollow Knight
Shared: Difficult · Platformer · 2D

A Difficult Game About Climbing
Shared: Psychological Horror · Difficult · Precision Platformer

The End Is Nigh
Shared: Precision Platformer · Difficult · Platformer

Nine Sols
Shared: Difficult · Action · Platformer

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

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Difficult · Platformer

VVVVVV
Shared: Precision Platformer · Difficult · Platformer

Rain World
Shared: Difficult · Platformer · Atmospheric

Black Myth: Wukong
Shared: Action · Action-Adventure · Adventure

Downwell
Shared: Precision Platformer · Action · Difficult

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

Blasphemous 2
Shared: Difficult · Adventure · 2D Platformer

Peaks of Yore
Shared: Difficult · Psychological Horror · Adventure

BlazBlue Entropy Effect
Shared: Action · Action-Adventure · 2D

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

Bloodstained: Ritual of the Night
Shared: Action · Adventure · 2.5D

Get To Work
Shared: Difficult · Precision Platformer · Adventure