Games like Steel Rain
Games like Steel Rain include Vampire Survivors, ICEY, Star Saviors, UFO 50, and Cyberhunt. We matched them by the tags players give Steel Rain on Steam (Shoot 'Em Up, Action, Indie, Side Scroller, and RPG): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Indie · Action

ICEY
Shared: Action · Side Scroller · Indie

Star Saviors
Shared: Shoot 'Em Up · Action · Indie

UFO 50
Shared: Indie · Action · Strategy

Cyberhunt
Shared: Action · Indie · Shoot 'Em Up

Rogue Legacy 2
Shared: Action · Indie · Arcade

20 Minutes Till Dawn
Shared: Shoot 'Em Up · Bullet Hell · Survival

Home Behind
Shared: Indie · RPG · Adventure

RADical ROACH Remastered
Shared: Action · Indie · Shoot 'Em Up

Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Action

LUFTRAUSERS
Shared: Indie · Action · Shoot 'Em Up

The Vagrant
Shared: Action · RPG · Side Scroller

Revolution Ace
Shared: Shoot 'Em Up · Action · Indie

Dungeon Munchies
Shared: Action · Indie · RPG

Eastern Exorcist
Shared: Action · Side Scroller · RPG

Zombotron
Shared: Action · Indie · Shoot 'Em Up

Mount & Blade II: Bannerlord
Shared: Strategy · RPG · Action

DRAINUS
Shared: Shoot 'Em Up · Action · Indie

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Bullet Hell

Broforce
Shared: Action · Indie · Side Scroller

Bladed fury
Shared: Action · Indie · RPG

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

The Escapists
Shared: Strategy · Indie · Action

Caster
Shared: Action · Indie · RPG