Games like True Galactic Mission
Games like True Galactic Mission include BALL x PIT, 12 is Better Than 6, Counter-Strike 2, Zombieville USA 3D, and Escape From Duckov. We matched them by the tags players give True Galactic Mission on Steam (Action, Arcade, Shooter, Top-Down Shooter, and 2D): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Action · Arcade · Top-Down Shooter

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

Counter-Strike 2
Shared: Shooter · Action

Zombieville USA 3D
Shared: Action · Arcade · Shooter

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

Broforce
Shared: Action · 2D · Shooter

METAL SLUG
Shared: Action · Arcade · 2D

METAL SLUG 3
Shared: Arcade · Action · Shooter

DoDonPachi Resurrection
Shared: Top-Down Shooter · Shooter · Arcade

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

Kill The Crows
Shared: Action · Arcade · Top-Down Shooter

Alex Jones: NWO Wars
Shared: Action · Arcade · Shooter

METAL SLUG X
Shared: Action · Arcade · 2D

Bit Blaster XL
Shared: Shooter · Arcade · Action

Police Stories
Shared: Action · Top-Down Shooter · Shooter

Exit the Gungeon
Shared: Arcade · Action · 2D

METAL SLUG XX
Shared: Action · Shooter · Arcade

The Ascent
Shared: Top-Down Shooter · Action · Shooter

Streets of Rage 4
Shared: Action · Arcade · 2D

Huntdown
Shared: Action · Shooter · 2D

SNKRX
Shared: Top-Down Shooter · Arcade · Shooter

LUFTRAUSERS
Shared: Arcade · Action · 2D

Planes, Bullets and Vodka
Shared: Action · Arcade · Shooter

ACE COMBAT™ 7: SKIES UNKNOWN
Shared: Arcade · Shooter · Action