Games like Gunmetal Arcadia Zero
Games like Gunmetal Arcadia Zero include Anomaly Agent, SANABI, Katana ZERO, Blasphemous 2, and Skul: The Hero Slayer. We matched them by the tags players give Gunmetal Arcadia Zero on Steam (Side Scroller, Hack and Slash, 2D Platformer, Platformer, and Action RPG): closest matches first, and among equally close ones the better-known games.

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Hack and Slash

SANABI
Shared: 2D Platformer · Pixel Graphics · Action

Katana ZERO
Shared: Platformer · 2D Platformer · Hack and Slash

Blasphemous 2
Shared: Side Scroller · 2D Platformer · Hack and Slash

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

Afterimage
Shared: 2D Platformer · Side Scroller · Hack and Slash

BlazBlue Entropy Effect
Shared: Platformer · 2D · Action-Adventure

Eastern Exorcist
Shared: Side Scroller · Hack and Slash · 2D

NINJA GAIDEN: Ragebound
Shared: 2D Platformer · Platformer · Side Scroller

Castlevania: Belmont's Curse
Shared: 2D Platformer · Action RPG · Platformer

Sonic Mania
Shared: Platformer · 2D · Side Scroller

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Action RPG · Action

Blade Assault
Shared: Platformer · 2D Platformer · Side Scroller

Broforce
Shared: Platformer · 2D · Side Scroller

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · 2D

Prince of Persia The Lost Crown
Shared: 2D Platformer · Side Scroller · Action-Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · 2D · Side Scroller

The Slormancer
Shared: Hack and Slash · Action RPG · 2D

Mina the Hollower
Shared: Action-Adventure · 2D Platformer · Platformer

ICEY
Shared: Hack and Slash · Side Scroller · Action

Celeste
Shared: Platformer · 2D Platformer · Pixel Graphics

F.I.S.T.: Forged In Shadow Torch
Shared: Platformer · 2D Platformer · Steampunk

Path of Exile 2
Shared: Hack and Slash · Action RPG · Action

The Messenger
Shared: Platformer · 2D · 2D Platformer