Games like Mr. Barrel
Games like Mr. Barrel include Minimalism, Caster, One Finger Death Punch, Super Hexagon, and Timberman. We matched them by the tags players give Mr. Barrel on Steam (Indie, Casual, Adventure, Action, and Fast-Paced): closest matches first, and among equally close ones the better-known games.

Minimalism
Shared: Indie · Casual · Action

Caster
Shared: Indie · Action · Adventure

One Finger Death Punch
Shared: Indie · Action · Fast-Paced

Super Hexagon
Shared: Indie · Difficult · Fast-Paced

Timberman
Shared: Casual · Indie · Action

Pikuniku
Shared: Indie · Casual · Adventure

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

Super Fancy Pants Adventure
Shared: Indie · Adventure · Action

Hollow Knight: Silksong
Shared: Indie · Difficult · Adventure

Hotline Miami
Shared: Indie · Action · Fast-Paced

No Time To Explain Remastered
Shared: Indie · Adventure · Casual

Shio
Shared: Indie · Casual · Action

Spin Rhythm XD
Shared: Casual · Indie · Difficult

Cyberhunt
Shared: Indie · Casual · Action

UFO 50
Shared: Indie · Action · Adventure

BEEP
Shared: Indie · Adventure · Action

Juicy Realm
Shared: Indie · Action · Adventure

Wobbly Life
Shared: Adventure · Casual · Indie

Hollow Knight
Shared: Indie · Difficult · Adventure

TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Indie · Adventure · Action

Trip to Vinelands
Shared: Indie · Action · Fast-Paced

Cart Racer
Shared: Indie · Casual · Action

Skul: The Hero Slayer
Shared: Indie · Action · Difficult

Devil Daggers
Shared: Indie · Difficult · Action