Games like Magic War
Games like Magic War include Vampire Survivors, Skul: The Hero Slayer, Broforce, BlazBlue Entropy Effect, and Shelldiver. We matched them by the tags players give Magic War on Steam (Action, Casual, Simulation, Arcade, and Beat 'em up): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Casual · Action

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Platformer

Broforce
Shared: Action · Platformer · Shooter

BlazBlue Entropy Effect
Shared: Action · Action Roguelike · Platformer

Shelldiver
Shared: Casual · Arcade · Simulation

Streets of Rage 4
Shared: Action · Beat 'em up · Arcade

Downwell
Shared: Action · Arcade · Platformer

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Beat 'em up · Arcade · Action

Twin Shot Deluxe
Shared: Action · Casual · Arcade

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

Rogue Legacy
Shared: Action · Platformer · Action Roguelike

Castle Crashers®
Shared: Beat 'em up · Action · 2D

One Finger Death Punch 2
Shared: Action · Casual · Beat 'em up

MADNESS: Project Nexus
Shared: Beat 'em up · Shooter · Action

KovaaK's
Shared: Action · Simulation · Shooter

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

Megabonk
Shared: Action Roguelike · Action · Arcade

Katana ZERO
Shared: Action · Platformer · Hack and Slash

Nova Drift
Shared: Arcade · Action Roguelike · Action

Timberman
Shared: Casual · Action · Arcade

Rogue Legacy 2
Shared: Action · Arcade · Platformer

Crab Champions
Shared: Action Roguelike · Arcade · Casual

One Finger Death Punch
Shared: Action · Beat 'em up · Casual

Commando Collection
Shared: Action · Beat 'em up · Arcade