Games like StarShip Wars
Games like StarShip Wars include Vampire Survivors, Half-Life, LUFTRAUSERS, Exit the Gungeon, and Half-Life: Opposing Force. We matched them by the tags players give StarShip Wars on Steam (Action, Arcade, Retro, 1990's, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: 2D · Singleplayer · Arcade

Half-Life
Shared: 1990's · Action · Singleplayer

LUFTRAUSERS
Shared: Arcade · Action · 2D

Exit the Gungeon
Shared: Arcade · Action · 2D

Half-Life: Opposing Force
Shared: Action · Singleplayer · 1990's

Half-Life: Blue Shift
Shared: Action · Singleplayer · Sci-fi

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

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

UFO 50
Shared: Action · Retro · Arcade

Warhammer 40,000: Boltgun
Shared: Retro · Action · Arcade

ZeroRanger
Shared: Action · Arcade · Retro

Cyberhunt
Shared: Action · Arcade · Indie

PAC-MAN™ Championship Edition DX+
Shared: Arcade · Retro · Action

Kung Fury: Street Rage - Ultimate Edition
Shared: Arcade · Action · Retro

BALL x PIT
Shared: Action · Arcade · Bullet Hell

Star Saviors
Shared: Action · Arcade · 2D

Shovel Knight: Treasure Trove
Shared: Retro · Action · 2D

Windowkill
Shared: Action · Arcade · 2D

SANABI
Shared: Action · Singleplayer · 2D

A Dance of Fire and Ice
Shared: Arcade · Singleplayer · 2D

Rogue Legacy 2
Shared: Arcade · Action · Indie

Megabonk
Shared: Action · Indie · Arcade

METAL SLUG
Shared: Action · Arcade · 2D

Retrowave
Shared: Retro · Action · Indie