The Uncharted 4 Multiplayer beta is now live on the PlayStation 4 for owners of The Nathan Drake Collection.
To get the beta simply go to the game tile, select overview and click to the right as seen below.
This will then take you to the following screen where you can download the beta. As seen below, the beta is around 10.3GB in size.
You can find out all about the beta on the PS Blog.
Go get it and don't forget to pre-order Uncharted 4 below.