Games like Sigma Star Saga DX
Games like Sigma Star Saga DX include ICEY, BioShock Infinite, Huntdown, Broforce, and DRAINUS. We matched them by the tags players give Sigma Star Saga DX on Steam (Action, RPG, Shooter, Shoot 'Em Up, and Side Scroller): closest matches first, and among equally close ones the better-known games.

ICEY
Shared: Action · Side Scroller · Anime

BioShock Infinite
Shared: Action · Shooter · RPG

Huntdown
Shared: Action · Shooter · Side Scroller

Broforce
Shared: Action · 2D · Pixel Graphics

DRAINUS
Shared: Action · Shoot 'Em Up · Shooter

Zombotron
Shared: Action · 2D · Shooter

Dungeon Munchies
Shared: Action · RPG · Pixel Graphics

The Vagrant
Shared: Action · RPG · 2D

Bloodstained: Ritual of the Night
Shared: RPG · Action · Side Scroller

METAL SLUG
Shared: Action · Side Scroller · 2D

Mass Effect™ Legendary Edition
Shared: RPG · Action · Sci-fi

Snowbreak: Containment Zone
Shared: Shooter · Action · Anime

Mass Effect (2007)
Shared: RPG · Action · Sci-fi

MEGA MAN X DiVE Offline
Shared: Action · RPG · Side Scroller

Fallout 4
Shared: RPG · Shooter · Action

Sword Art Online: Fatal Bullet
Shared: RPG · Action · Anime

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

Soda Crisis
Shared: Action · Side Scroller · Shoot 'Em Up

DRAGON BALL Z: KAKAROT
Shared: Action · RPG · Anime

Guns, Gore and Cannoli 2
Shared: Action · Side Scroller · 2D

Borderlands 2
Shared: Action · Shooter · RPG

Intrusion 2
Shared: Action · Shooter · 2D

Eastern Exorcist
Shared: Action · RPG · Side Scroller

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