Games like Hiden Ruin
Games like Hiden Ruin include Vampire Survivors, Timberman, SANABI, Celeste, and pureya. We matched them by the tags players give Hiden Ruin on Steam (Casual, Singleplayer, Pixel Graphics, 2D Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Pixel Graphics · Singleplayer · 2D

Timberman
Shared: Casual · Pixel Graphics · Singleplayer

SANABI
Shared: Pixel Graphics · 2D Platformer · Singleplayer

Celeste
Shared: Pixel Graphics · 2D Platformer · Singleplayer

pureya
Shared: Casual · Singleplayer · Arcade

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Singleplayer

Super Meat Boy
Shared: 2D Platformer · Pixel Graphics · Singleplayer

Thomas Was Alone
Shared: 2D Platformer · Side Scroller · 2D

Turbo Pug
Shared: Casual · Pixel Graphics · 2D

Downwell
Shared: Pixel Graphics · 2D Platformer · Arcade

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Pixel Graphics · 2D · Side Scroller

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Singleplayer

Skul: The Hero Slayer
Shared: Pixel Graphics · Singleplayer · 2D

Rhythm Doctor
Shared: Pixel Graphics · Singleplayer · Indie

A Dance of Fire and Ice
Shared: Singleplayer · 2D · Arcade

Papers, Please
Shared: Pixel Graphics · Singleplayer · Indie

To The Core
Shared: Casual · 2D · Arcade

Katana ZERO
Shared: Pixel Graphics · 2D Platformer · 2D

Balatro
Shared: Singleplayer · Pixel Graphics · Casual

Gravity Circuit
Shared: Pixel Graphics · Singleplayer · 2D

Exit the Gungeon
Shared: Arcade · Pixel Graphics · Singleplayer

Razortron 2000
Shared: Casual · Singleplayer · Arcade

Cookie Clicker
Shared: Casual · Pixel Graphics · Indie

UFO 50
Shared: Pixel Graphics · 2D · Indie