I'm new to the game, and I have heard a lot of good things about it. I have been very excited to play this game and hyped when I saw the demo. Yes, the available mission is really short, but they also included a map for a sandbox gameplay, you can explore the area and cause a bit of mayhem, this portion of the demo makes gameplay unlimited while waiting for the full release. I think most people miss this since the trailer plays as soon as you end the 1st mission. Go back and play the sandbox map!!!
