The Resurgence DLC set is my favorite DLC for Defense Grid!
The entire Resurgence DLC set is 8 levels spread across 4 "map packs" on Steam, and these maps are some of my favorites of the entire Defense Grid basegame and DLC's! Excellent!
Excellent level designs offering new and unique challenges, and some that are quite challenging indeed with me barely hanging on to the end! What a blast! One of the levels ("Tactical Diversion") while a quite simple map on appearance proved to be one of my biggest challenges. I had to restart that one level 6 or 7 times before I could compete it!
Even though the Resurgence DLC set (as a whole) has 8 levels just like the "You Monster" and "Containment" DLCs do, the Resurgence DLC campaign took me 6.1hrs to complete; more time than the other two DLCs combined! I must have struggled with (and thoroughly enjoyed) this DLC set a lot! In comparison, "You Monster" took me 2.7hrs and "Containment" 3.3hrs.
A fabulous DLC set for Defense Grid. 9 out of 10. (Just be sure to get all 4 "Map Packs" to get all 8 levels)