Hello there, the upcoming biggest space simulation mmo Star Citizen will be free to play from the 20h November until the 2nd December.
During these two weeks, all ships will be available to fly for everyone to be able to test them, so download the Alpha and come try it.
All details here : https://www.robertsspaceindustries.com/iae2950
Go here to start your space adventures : https://www.robertsspaceindustries.com/playstarcitizen