Very ambitious, Star Citizen is a long-term project imagined by Chris Roberts (the creator of Wing Commander) and developed by the studio Cloud Imperium Games. Still under development, this multiplayer oriented spatial simulation is currently available through modules playable by certain players who have helped with crowdfunding.
From PAX East, Roberts Space Industries has set up a open test phase of his game, allowing to download and play from today until March 16. It is possible to test the Hangar module and fly on board the Anvil Hornet F7C.
To take advantage of this, go to this address, create an account and enter the following download code: PAXEASTFREEFLY2K15. You can then recover the game data, for a total of about 21 GB.
Note that the game is only playable on PC (Windows).