Today, Microsoft announced that their highly anticipated re-entry into the flight simulator market -- Microsoft Flight -- will be a "freemium" game, in which it's free to play but some additional content can be purchased. They also announced that it'll be available in the Spring of 2012.

It now appears the company has begun sending out invitations to the private beta of the game, but it appears they're being highly secretive about it. The screenshots sent to us show that the terms and conditions state that you won't leave the game unattended, nor will you play it when others are in the room. Harsh.

More as we hear it, hopefully with screenshots of actual gameplay.