Games like Zako Slayer
Games like Zako Slayer include ICEY, The Vagrant, SANABI, Anomaly Agent, and Bladed fury. We matched them by the tags players give Zako Slayer on Steam (Side Scroller, 2D Platformer, Bullet Hell, Action, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

ICEY
Shared: Action · Side Scroller · Hack and Slash

The Vagrant
Shared: Action · Side Scroller · Female Protagonist

SANABI
Shared: Action · 2D Platformer · Adventure

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

Bladed fury
Shared: Action · Side Scroller · Adventure

Warhammer 40,000: Shootas, Blood & Teef
Shared: Side Scroller · 2D Platformer · Adventure

Afterimage
Shared: 2D Platformer · Side Scroller · Female Protagonist

Shank 2
Shared: Action · Side Scroller · Beat 'em up

PATAPON 1+2 REPLAY
Shared: Action · 2D Platformer · Side Scroller

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

Shank
Shared: Action · Side Scroller · Beat 'em up

Like a Dragon: Ishin!
Shared: Action · Adventure · Beat 'em up

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

Eastern Exorcist
Shared: Side Scroller · Action · Adventure

Stellar Blade™
Shared: Action · Hack and Slash · Female Protagonist

Darksiders III
Shared: Action · Hack and Slash · Adventure

Guns, Gore and Cannoli 2
Shared: Side Scroller · Action · Shoot 'Em Up

Rise of the Tomb Raider™
Shared: Action · Adventure · Female Protagonist

Touhou Luna Nights
Shared: Side Scroller · Bullet Hell · Action-Adventure

Furi
Shared: Bullet Hell · Hack and Slash · Shoot 'Em Up

Tomb Raider Game of the Year
Shared: Action · Adventure · Female Protagonist

Rabi-Ribi
Shared: Bullet Hell · Side Scroller · Female Protagonist

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

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