Games like Demons Happened
Games like Demons Happened include Baba Is You, Hollow Knight, Nuclear Throne, Hollow Knight: Silksong, and Titan Souls. We matched them by the tags players give Demons Happened on Steam (Top-Down Shooter, Puzzle, Difficult, Action-Adventure, and 2D): closest matches first, and among equally close ones the better-known games.

Baba Is You
Shared: Puzzle · Difficult · 2D

Hollow Knight
Shared: Difficult · 2D · Indie

Nuclear Throne
Shared: Difficult · Top-Down Shooter · Post-apocalyptic

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

Titan Souls
Shared: Difficult · 2D · Top-Down

Hotline Miami 2: Wrong Number
Shared: Difficult · Top-Down · Top-Down Shooter

BlazBlue Entropy Effect
Shared: 2D · Action-Adventure · Action

Hotline Miami
Shared: Top-Down · Action · Difficult

Zup! S
Shared: Puzzle · 2D · Indie

LIMBO
Shared: Puzzle · 2D · Indie

Geometry Dash
Shared: Difficult · 2D · Singleplayer

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Difficult · Action

Tiny Rogues
Shared: Top-Down Shooter · Difficult · Action-Adventure

Intravenous
Shared: Difficult · Top-Down Shooter · Top-Down

The Escapists
Shared: 2D · Difficult · Puzzle

12 is Better Than 6
Shared: Top-Down Shooter · Action · 2D

Endoparasitic
Shared: 2D · Top-Down · Action-Adventure

SANABI
Shared: 2D · Action-Adventure · Action

暖雪 Warm Snow
Shared: Action-Adventure · 2D · Top-Down

TUNIC
Shared: Puzzle · Action-Adventure · Difficult

Defy Gravity Extended
Shared: Puzzle · 2D · Difficult

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

Please, Don’t Touch Anything
Shared: Puzzle · Difficult · 2D

RUINER
Shared: Top-Down Shooter · Difficult · Action