Games like RuinsStory
Games like RuinsStory include Marfusha:Sentinel Girls, Broforce, Half-Life 2, Lost Ruins, and BlazBlue Entropy Effect. We matched them by the tags players give RuinsStory on Steam (Action, Shooter, Deckbuilding, 2D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Marfusha:Sentinel Girls
Shared: Pixel Graphics · Shooter · Anime

Broforce
Shared: Action · Pixel Graphics · 2D

Half-Life 2
Shared: Action · Shooter · Sci-fi

Lost Ruins
Shared: Action · Pixel Graphics · Anime

BlazBlue Entropy Effect
Shared: Action · 2D · Pixel Graphics

BioShock Infinite
Shared: Action · Shooter · Story Rich

Katana ZERO
Shared: Action · Pixel Graphics · 2D

Cave Story+
Shared: Shooter · 2D · Action

SANABI
Shared: Action · Pixel Graphics · 2D

The Final Station
Shared: Pixel Graphics · 2D · Action

Crysis 3 Remastered
Shared: Action · Shooter · Sci-fi

Gensokyo Night Festival
Shared: Action · Pixel Graphics · Cute

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

Snezhinka:Sentinel Girls2
Shared: Pixel Graphics · Anime · Cute

HELLDIVERS™ 2
Shared: Shooter · Action · Sci-fi

NEEDY STREAMER OVERLOAD
Shared: Anime · Pixel Graphics · Cute

ICEY
Shared: Action · Anime · 2D

Dungeon Munchies
Shared: Action · Pixel Graphics · 2D

Last Command
Shared: 2D · Cute · Action

Bright Memory: Infinite
Shared: Action · Shooter · Sci-fi

Eastward
Shared: Pixel Graphics · Action · Story Rich

Titanfall® 2
Shared: Shooter · Action · Sci-fi

Huntdown
Shared: Shooter · Action · Pixel Graphics

PRAGMATA
Shared: Action · Cute · Sci-fi