Number four of the popular Starcraft 2 battle reports was "leaked" earlier today. The battle reports are videos of Starcraft 2 match which are commentated by the game developers and as such give a good insight of how the final game will play.

This time around we get to see some new features in action, such as Psi Storms, Siege Tanks, new cliff mechanics and especially the Nuke, which has been made much more accessable in Starcraft 2 and some argue is overpowered in its current incarnation.

Links
Youtube
(low quality)
Download (high quality, ingame.de)