Games like Spectrum Forces
Games like Spectrum Forces include Bit Blaster XL, Crysis 3 Remastered, Crysis 2 Remastered, Huntdown, and Broforce. We matched them by the tags players give Spectrum Forces on Steam (Action, Shooter, Shoot 'Em Up, 2D, and Colorful): closest matches first, and among equally close ones the better-known games.

Bit Blaster XL
Shared: Shoot 'Em Up · Shooter · Action

Crysis 3 Remastered
Shared: Action · Shooter · Aliens

Crysis 2 Remastered
Shared: Action · Shooter · Aliens

Huntdown
Shared: Shooter · Action · Pixel Graphics

Broforce
Shared: Action · 2D · Pixel Graphics

Crysis Remastered
Shared: Action · Shooter · Aliens

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

DRAINUS
Shared: Action · Shoot 'Em Up · Shooter

STAR WARS™ Battlefront™ II
Shared: Shooter · Action · Space

Titanfall® 2
Shared: Shooter · Action · Futuristic

Aliens: Fireteam Elite
Shared: Shooter · Action · Aliens

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

Aliens: Colonial Marines Collection
Shared: Action · Shooter · Aliens

PRAGMATA
Shared: Action · Cute · Sci-fi

Let Them Come
Shared: Action · Shooter · 2D

Crysis 2 - Maximum Edition
Shared: Action · Shooter · Aliens

Zombotron
Shared: Action · 2D · Shooter

Half-Life 2
Shared: Action · Shooter · Sci-fi

Neptunia Shooter
Shared: Action · Shoot 'Em Up · Cute

Nova Drift
Shared: Shoot 'Em Up · Shooter · Action

Soda Crisis
Shared: Action · Shoot 'Em Up · Shooter

Black Mesa
Shared: Action · Shooter · Sci-fi

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Action · 2D

Dead Space (2008)
Shared: Action · Shooter · Sci-fi