Games like Polygon War
Games like Polygon War include Have a Nice Death, Skul: The Hero Slayer, Vampire Survivors, BALL x PIT, and BlazBlue Entropy Effect. We matched them by the tags players give Polygon War on Steam (Action, Action Roguelike, 2D, Top-Down, and Colorful): closest matches first, and among equally close ones the better-known games.

Have a Nice Death
Shared: Action Roguelike · 2D · Action

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

Vampire Survivors
Shared: Action Roguelike · 2D · Action

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

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · 2D

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

The Binding of Isaac
Shared: Action Roguelike · Action · Top-Down

UnderMine
Shared: Action Roguelike · Action · Top-Down

Sephiria
Shared: Action Roguelike · Action · Combat

Dead Cells
Shared: Action Roguelike · 2D · Action

Cult of the Lamb
Shared: Action Roguelike · Singleplayer · 2D

Shape of Dreams
Shared: Action Roguelike · Action · Top-Down

Stick It to the Stickman
Shared: Action · Funny · 2D

Hades
Shared: Action Roguelike · Action · Singleplayer

ShellShock Live
Shared: Action · 2D · Early Access

Rocket Rats
Shared: Action Roguelike · 2D · Action

Rogue Legacy
Shared: Action Roguelike · Action · 2D

Devil Slayer - Raksasi
Shared: Action Roguelike · Action · Top-Down

Halls of Torment
Shared: Action Roguelike · Action · Top-Down

Death Must Die
Shared: Action Roguelike · Action · 2D

Windblown
Shared: Action Roguelike · Combat · Action

Castle Crashers®
Shared: 2D · Funny · Action

Dungreed
Shared: Action Roguelike · Action · 2D

Black Myth: Wukong
Shared: Action · Combat · Singleplayer