Defense Grid Awakened

Finished the story mode of Defense Grid: The Awakening. Last missions was a great finisher, took me a couple tries but I knocked it out.

It's worth going back and re-playing the missions, as there are different modes to try out, including the Grinder mode where you face 99 waves of creeps, and tower-limited modes where you can only have either 10 or 20 towers at one time. Have to give some of those a shot.