When comparing Star Citizen (still in development) vs FlightGear, the Slant community recommends Star Citizen (still in development) for most people. In the question“What are the best Space Sims on Steam?” Star Citizen (still in development) is ranked 6th while FlightGear is ranked 7th. The most important reason people chose Star Citizen (still in development) is:
Squadron 42 is a single player campaign that takes place in the in game universe that allows players to play offline.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Includes a singleplayer mode, called "Squadron 42"
Squadron 42 is a single player campaign that takes place in the in game universe that allows players to play offline.
Pro Over $73million in funding
A game with the huge scope of Star Citizen will cost a lot of money to develop, and through multiple campaigns, Star Citizen has raised a huge amount of money to make that happen.
Pro Vast, detailed sci-fi world
A long term goal is to have over 400 different star systems in game, most of which will have many planets within them.
Pro Ability to command persistent ships and stations
Players will be able to command multi-person ships with other users who will be able to command their own stations on said ships.
Pro Dynamic economy system
The economy of the game and the actions to keep it moving are constantly going on in the background but allows for players to step in and out of it at their leisure in order to take part.
Pro A true PC game
It's been stated that the game will take full advantage of PC's capabilities and will not be held back by a need to accommodate a console port.
Pro Worldwide scenery
FlightGear has scenery that contains environments to fly in from the whole globe.
Pro Free and Open Source
All code written for FlightGear is opensource and available for anyone to use.
Pro Crash animations in some aircrafts
Pro It has world-wide multiplayer
Pro Live cockpit
Pro A lot of aircrafts to add
Pro It has amazing graphics
Pro You can almost recreate real incidents
Pro No bugs
Cons
Con Commercial launch is still a year away (2016)
The commercial launch of the persistent universe game will be sometime in 2016.
Con Not as graphically advanced as commercial competition
Con Getting stuck upside down
After a crash a pilot may be stuck in an upside down position with no way to recover.