Hidden Path Entertainment have released the Defense Grid: Resurgence Map Pack 4 today, The Pack is available on Steam for 0.99$ and is the final installment to the Resurgence Series. The Pack will offer two new environments to play. Here is a small description:
In Kill Zone, will you construct your defenses near the spiral road in, the spiral road out, or the open platform in the middle? Perhaps all three! But you’ll need to be on your toes to deter the invaders. Overflow has numerous connected platforms that will provide countless options to turn back the enemies. Will you be able to keep the cores safe? There's only one way to find out!