Games like Original Journey
Games like Original Journey include Enter the Gungeon, Skul: The Hero Slayer, Vampire Survivors, Spelunky, and The Binding of Isaac: Rebirth. We matched them by the tags players give Original Journey on Steam (Action Roguelike, Bullet Hell, 2D Platformer, Difficult, and Shooter): closest matches first, and among equally close ones the better-known games.

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Difficult

Skul: The Hero Slayer
Shared: Action Roguelike · Roguelike · Platformer

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

Spelunky
Shared: Action Roguelike · Platformer · Difficult

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Difficult · Roguelike

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Difficult

The Binding of Isaac
Shared: Action Roguelike · Difficult · Roguelike

Rabbit and Steel
Shared: Bullet Hell · Action Roguelike · Difficult

Celeste
Shared: Difficult · 2D Platformer · Platformer

Risk of Rain (2013)
Shared: Action Roguelike · Roguelike · Platformer

SANABI
Shared: 2D Platformer · Difficult · Story Rich

Neon Abyss
Shared: Platformer · Roguelike · Shooter

Dead Cells
Shared: Action Roguelike · Roguelike · 2D

Hades
Shared: Action Roguelike · Roguelike · Indie

Noita
Shared: Difficult · Roguelike · Action Roguelike

Rogue Legacy
Shared: Action Roguelike · Platformer · Roguelike

Hollow Knight
Shared: Difficult · Platformer · 2D

BlazBlue Entropy Effect
Shared: Action Roguelike · Platformer · Action-Adventure

Dungreed
Shared: Action Roguelike · Roguelike · Difficult

Tiny Rogues
Shared: Action Roguelike · Bullet Hell · Difficult

Pathogenic
Shared: Bullet Hell · Action Roguelike · Roguelike

暖雪 Warm Snow
Shared: Action Roguelike · Roguelike · Action-Adventure

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

Death Must Die
Shared: Action Roguelike · Bullet Hell · RPG