Games like Comanche 4
Games like Comanche 4 include War Thunder, Arma 3, Nuclear Option, Project Wingman, and VTOL VR. We matched them by the tags players give Comanche 4 on Steam (Action, Simulation, Classic, Flight, and Military): closest matches first, and among equally close ones the better-known games.

War Thunder
Shared: Action · Simulation · Flight

Arma 3
Shared: Action · Military · Simulation

Nuclear Option
Shared: Simulation · Action · Flight

Project Wingman
Shared: Action · Flight · Military

VTOL VR
Shared: Flight · Simulation · Action

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

Arma Reforger
Shared: Simulation · Military · Action

FPV Kamikaze Drone
Shared: Action · Simulation · Flight

IL-2 Sturmovik: 1946
Shared: Simulation · Flight · Military

ARMA: Cold War Assault Remastered
Shared: Action · Simulation · Military

Arma 2: Operation Arrowhead
Shared: Simulation · Action · Military

STAR WARS™: Rogue Squadron 3D
Shared: Action · Simulation · Classic

WARDOGS
Shared: Action · Military · Simulation

ACE COMBAT 8: WINGS OF THEVE
Shared: Action · Flight · Military

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

Counter-Strike
Shared: Action · Classic · Military

Hell Let Loose: Vietnam
Shared: Action · Simulation · Military

Bomber Crew
Shared: Simulation · Flight · Action

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Classic · Military

Men of War: Assault Squad 2
Shared: Simulation · Action · Military

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

Heliborne Collection
Shared: Flight · Military · Simulation

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

Half-Life: Opposing Force
Shared: Action · Classic · Military