Shield Defense - It's like pong with missiles, and the other team doesn't have a paddle. If you can bounce back these little balls of destruction at just the right angle, you win. Use your shield to protect your base from attacking tanks and repel their own projectiles back at them! Earn money by killing tanks and buy upgrades between levels to stay ahead of the game. You will receive one bonus point every 3, 4, and 5 levels in Sergeant, Captain, and General mode respectively... don’t forget to spend them!