"Complete Wave 1" is an objective in the sidequest Hyperion Slaughter: Round 3 in Borderlands 2
Walkthrough[edit]
Turn to the South. You have a number of Loaders to deal with. You have EXP Loaders and PWR Loaders to start things off. Let the PWR Loaders come to you. This keeps the EXP Loaders at a safe distance where they are far less likely to rush you. They are all that comprise of the First Wave.