Games like Rat Musou
Games like Rat Musou include Planes, Bullets and Vodka, Halo: Spartan Assault, Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad, PUBG: BATTLEGROUNDS, and Waves. We matched them by the tags players give Rat Musou on Steam (Action, Arcade, Shooter, Twin Stick Shooter, and 2D): closest matches first, and among equally close ones the better-known games.

Planes, Bullets and Vodka
Shared: Action · Arcade · Shooter

Halo: Spartan Assault
Shared: Action · Shooter · Top-Down

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · 2D · Action

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · Survival

Waves
Shared: Shooter · Twin Stick Shooter · Arcade

BALL x PIT
Shared: Action · Arcade · Top-Down

Snake Force
Shared: Action · Shooter · Top-Down

Orbt XL
Shared: Arcade · Action · 2D

Broforce
Shared: Action · 2D · Shooter

Bit Blaster XL
Shared: Shooter · Arcade · Action

Borderlands 2
Shared: Action · Shooter · Funny

METAL SLUG
Shared: Action · Arcade · 2D

Escape From Duckov
Shared: Action · Shooter · Top-Down

POSTAL: Brain Damaged
Shared: Action · Shooter · Stylized

Renegade Ops
Shared: Action · Arcade · Twin Stick Shooter

Shotgun Cop Man
Shared: Action · Shooter · Arcade

Windowkill
Shared: Action · Arcade · 2D

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

pureya
Shared: Arcade · 2D · Action

Sektori
Shared: Arcade · Twin Stick Shooter · Colorful

HELLDIVERS™ Dive Harder Edition
Shared: Action · Twin Stick Shooter · Shooter

Exit the Gungeon
Shared: Arcade · Action · 2D

ShellShock Live
Shared: Action · 2D · Shooter

Crimsonland
Shared: Action · Shooter · Top-Down