Earth Defense Force: Insect Armageddon (2011, Vicious Cycle Software)
This has always been my favorite EDF spin-off. I love the enemy designs, Survival mode (why hasn't Sandlot put this in the main series yet?), and Jet Armor has some of the most satisfying animations. It's a shame Vicious Cycle is dead so a sequel is unlikely.
Bonus pic because I couldn't decide between the two Daddy Long Legs screenshots I took:












