Games like BRAIN / OUT
Games like BRAIN / OUT include Broforce, PUBG: BATTLEGROUNDS, Apex Legends™, Once Human, and Delta Force. We matched them by the tags players give BRAIN / OUT on Steam (Free to Play, 2D, Shooter, Multiplayer, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: 2D · Pixel Graphics · Action

PUBG: BATTLEGROUNDS
Shared: Shooter · Multiplayer · Survival

Apex Legends™
Shared: Free to Play · Multiplayer · Shooter

Once Human
Shared: Free to Play · Multiplayer · Action

Delta Force
Shared: Free to Play · Multiplayer · Shooter

Terraria
Shared: 2D · Multiplayer · Survival

Arena Breakout: Infinite
Shared: Free to Play · Multiplayer · Shooter

Pixel Gun 3D: PC Edition
Shared: Shooter · Multiplayer · Pixel Graphics

Halo Infinite
Shared: Free to Play · Multiplayer · Shooter

Call of Duty®: Warzone™
Shared: Free to Play · Multiplayer · Shooter

Destiny 2
Shared: Free to Play · Multiplayer · Shooter

Paladins®
Shared: Free to Play · Multiplayer · Shooter

Duck Game
Shared: Multiplayer · 2D · Pixel Graphics

Marvel Rivals
Shared: Free to Play · Multiplayer · Action

Left 4 Dead 2
Shared: Multiplayer · Shooter · Action

World of Warships
Shared: Free to Play · Shooter · Multiplayer

Brawlhalla
Shared: Free to Play · Multiplayer · Platformer

Farlight 84
Shared: Free to Play · Shooter · Multiplayer

Enlisted
Shared: Free to Play · Action · Multiplayer

King Arthur's Gold
Shared: 2D · Multiplayer · Pixel Graphics

War Thunder
Shared: Free to Play · Action · Multiplayer

DayZ
Shared: Survival · Multiplayer · Shooter

THE FINALS
Shared: Free to Play · Multiplayer · Shooter

Awesomenauts
Shared: 2D · Multiplayer · Action