Games like room13
Games like room13 include Deadlight, Vampire Survivors, Timberman, Rogue Legacy 2, and Skul: The Hero Slayer. We matched them by the tags players give room13 on Steam (Action, Indie, Casual, Zombies, and Platformer): closest matches first, and among equally close ones the better-known games.

Deadlight
Shared: Action · Zombies · Indie

Vampire Survivors
Shared: Indie · 2D · Casual

Timberman
Shared: Casual · Indie · Action

Rogue Legacy 2
Shared: Action · Indie · Arcade

Skul: The Hero Slayer
Shared: Action · Indie · 2D

Rogue Legacy
Shared: Indie · Action · Platformer

Hollow Knight
Shared: Platformer · Indie · 2D

Defy Gravity Extended
Shared: Indie · Platformer · Action

BEEP
Shared: Indie · Platformer · Action

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

Broforce
Shared: Action · Indie · Platformer

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

Gensokyo Night Festival
Shared: Action · Indie · Casual

Zombotron
Shared: Action · Indie · 2D

Hollow Knight: Silksong
Shared: Indie · 2D · Platformer

Plants vs. Zombies GOTY Edition
Shared: Zombies · Casual · Singleplayer

Minimalism
Shared: Indie · Action · Casual

One Finger Death Punch
Shared: Action · Indie · Casual

Geometry Dash
Shared: 2D · Platformer · Indie

Cyberhunt
Shared: Action · Indie · Casual

Super Fancy Pants Adventure
Shared: Action · Indie · Casual

One Finger Death Punch 2
Shared: Action · Indie · Casual

Mark of the Ninja
Shared: Indie · Platformer · Action

Katana ZERO
Shared: Action · Platformer · Indie