Carrier Command: Gaea Mission Alternatives

Nuclear Dawn is an Action-Adventure, Real-time Strategy, First-person Shooter, Co-op, Single and Multiplayer video game developed by GameConnect and published by Iceberg Interactive.

Birds of Steel is developed by Gaijin Entertainment for PlayStation and Xbox.

Uprising X is a First-person Shooter, Real-time Strategy, Sci-fi, Single and Multiplayer video game developed by 3DO Company and published by Cyclone Studios.

Sky Rogue is an Arcade, Adventure-based and Single-player Flight Simulation published by Fractal Phase.

Ace Combat 6 is a Single and Multiplayer Flight Simulation published by Namco Bandai Games.

The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. It also simulates space flight in Earth's orbit. It's flight dynamics engine (JSBSim) is used in a 2015 NASA benchmark.

Microsoft Flight Simulator X is an exciting Open World, Realistic, Single and Multiplayer Flight Simulation developed by ACES Game Studio and published by Microsoft Game Studios.

Tom Clancy’s H.

Flying Baron 1916 is an Action-Adventure, Combat, and Single-player Flight Simulation developed and published by Magnussoft.

Parkan: Iron Strategy is an Action, Real-time Strategy, Sci-Fi, First-person Shooter and Single-player video game developed by Nikita Online.

The Settlers is a free web browser based strategy game along with a gameplay that drops anywhere between Age of Empires and the online strategy style.

The Lightspark project

Open Source

Natural Selection 2 developed and published by Unknown Worlds Entertainment.