"Complete Wave 3" is an objective in the sidequest Hyperion Slaughter: Round 5 in Borderlands 2
Walkthrough[edit]
This wave begins with numerous EXP Loaders emerging from the South with a little PWR Loader back up. Take them out and a Super Badass Loader will touch down in the middle of the area. You will have to deal with 3 of them in total to move on.