Games like Starbase Gunship
Games like Starbase Gunship include Project Wingman, War Thunder, ACE COMBAT™ 7: SKIES UNKNOWN, Elite Dangerous, and STAR WARS™: Squadrons. We matched them by the tags players give Starbase Gunship on Steam (Action, Space Sim, Simulation, Flight, and Sci-fi): closest matches first, and among equally close ones the better-known games.

Project Wingman
Shared: Action · Flight · War

War Thunder
Shared: Action · Simulation · Flight

ACE COMBAT™ 7: SKIES UNKNOWN
Shared: Flight · War · Action

Elite Dangerous
Shared: Space Sim · Simulation · Space

STAR WARS™: Squadrons
Shared: Flight · Action · Space

Nuclear Option
Shared: Simulation · Action · Flight

Arma 3
Shared: Action · Simulation · Military

VTOL VR
Shared: Flight · Simulation · Action

X4: Foundations
Shared: Simulation · Space Sim · Space

Arma Reforger
Shared: Simulation · Action · Realistic

House of the Dying Sun
Shared: Action · Simulation · Space Sim

X Rebirth
Shared: Simulation · Action · Space Sim

SpaceEngine
Shared: Sci-fi · Space Sim · Space

Starpoint Gemini 2
Shared: Simulation · Space Sim · Space

FPV Kamikaze Drone
Shared: Action · Simulation · War

Hardspace: Shipbreaker
Shared: Simulation · Sci-fi · Space

Avorion
Shared: Space Sim · Flight · Space

MechWarrior 5: Clans
Shared: Action · Simulation · Sci-fi

EVERSPACE™
Shared: Action · Space Sim · Space

IRON NEST: Heavy Turret Simulator
Shared: Simulation · Action · War

Starship Troopers: Extermination
Shared: Action · Sci-fi · Aliens

Microsoft Flight Simulator X: Steam Edition
Shared: Simulation · Flight · Realistic

SpaceBourne 2
Shared: Space Sim · Flight · Action

Warhammer 40,000: Space Marine 2
Shared: Action · Sci-fi · War