Games like Atrion Project
Games like Atrion Project include Katana ZERO, Hollow Knight, SANABI, Skul: The Hero Slayer, and Blasphemous 2. We matched them by the tags players give Atrion Project on Steam (Action, Hack and Slash, Platformer, Side Scroller, and Souls-like): closest matches first, and among equally close ones the better-known games.

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

Hollow Knight
Shared: Platformer · Souls-like · Difficult

SANABI
Shared: Action · Pixel Graphics · Platformer

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Platformer

Blasphemous 2
Shared: Difficult · Souls-like · Hack and Slash

Dead Cells
Shared: Hack and Slash · Adventure · Souls-like

Hollow Knight: Silksong
Shared: Difficult · Souls-like · Platformer

Super Meat Boy
Shared: Platformer · Difficult · Pixel Graphics

Celeste
Shared: Platformer · Difficult · Pixel Graphics

Nine Sols
Shared: Souls-like · Action · Platformer

Blasphemous
Shared: Souls-like · Pixel Graphics · Action

ICEY
Shared: Action · Hack and Slash · Side Scroller

Ghostrunner
Shared: Action · Fast-Paced · Hack and Slash

Anomaly Agent
Shared: Hack and Slash · Side Scroller · Platformer

Eastern Exorcist
Shared: Action · Side Scroller · Hack and Slash

Shovel Knight: Treasure Trove
Shared: Platformer · Action · Pixel Graphics

Pizza Tower
Shared: Fast-Paced · Platformer · Action

Hyper Light Drifter
Shared: Action · Pixel Graphics · Hack and Slash

Black Myth: Wukong
Shared: Action · Souls-like · Singleplayer

Foregone
Shared: Action · Platformer · Side Scroller

Gravity Circuit
Shared: Action · Platformer · Pixel Graphics

Jump King
Shared: Difficult · Platformer · Action

NINJA GAIDEN: Ragebound
Shared: Action · Platformer · Side Scroller

Broforce
Shared: Action · Platformer · Pixel Graphics