Games like Defendor
Games like Defendor include Hotline Miami, Hotline Miami 2: Wrong Number, BALL x PIT, Huntdown, and Planes, Bullets and Vodka. We matched them by the tags players give Defendor on Steam (Action, 2D, Shooter, Shoot 'Em Up, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Hotline Miami
Shared: Action · Pixel Graphics · Top-Down

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Top-Down

BALL x PIT
Shared: Action · Shoot 'Em Up · Top-Down Shooter

Huntdown
Shared: Action · Shooter · Pixel Graphics

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Shooter

Broforce
Shared: Action · 2D · Pixel Graphics

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

Bit Blaster XL
Shared: Shoot 'Em Up · Shooter · 2D

DoDonPachi Resurrection
Shared: Shoot 'Em Up · Top-Down Shooter · Shooter

Cyberhunt
Shared: Action · Shoot 'Em Up · 2D

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

Warhammer 40,000: Boltgun
Shared: Action · Shooter · Pixel Graphics

METAL SLUG
Shared: Action · 2D · Shoot 'Em Up

ARCADE GAME SERIES: GALAGA
Shared: Action · Shoot 'Em Up · 2D

METAL SLUG X
Shared: Action · 2D · Shoot 'Em Up

DEVIL BLADE REBOOT
Shared: Action · Shooter · Shoot 'Em Up

DRAINUS
Shared: Action · Shoot 'Em Up · Shooter

ZeroRanger
Shared: Shoot 'Em Up · Action · 2D

12 is Better Than 6
Shared: Action · Shooter · Top-Down Shooter

LUFTRAUSERS
Shared: Action · 2D · Pixel Graphics

Door Kickers: Action Squad
Shared: Action · Pixel Graphics · Shooter

Titanfall® 2
Shared: Shooter · Action · Futuristic

Sky Force Reloaded
Shared: Shoot 'Em Up · Action · Top-Down Shooter

Blazing Chrome
Shared: Action · Pixel Graphics · 2D