Borderlands: The Pre-Sequel

Story related, cannot be missed.

The Opha Superior is an enemy boss that you fight during the mission 'The Beginning of the End' in the area 'Eleseer' and you just need to kill it for the achievement. This is not a difficult enemy at all, just blast away at it and when the 'Putti's' come in to try and heal it, kill them and resume shooting the Opha Superior. Personally i killed it with my shotgun before the Putti's had the chance to heal it.

Note that some people are reporting that they somehow managed to miss this achievement, so when you are in Eleseer where the Vault is at the end of the game, DO NOT enter the Vault without first finding and killing the Opha Superior. Just look everywhere around the area, it's only small.

Story related, cannot be missed.

The Opha Superior is an enemy boss that you fight during the mission 'The Beginning of the End' in the area 'Eleseer' and you just need to kill it for the achievement. This is not a difficult enemy at all, just blast away at it and when the 'Putti's' come in to try and heal it, kill them and resume shooting the Opha Superior. Personally I killed it with my shotgun before the Putti's had the chance to heal it.

Another method on taking him out is to make the group hostile and then running back to the door leading to the area where you fight him. The group will follow you back, but you won’t be shot at by the turrets every second. Simply pump him with bullets (recommend a shock weapon) to deplete his shields and then hit him with your best weapons to take him down with minimal frustration.

Note that some people are reporting that they somehow managed to miss this achievement, so when you are in Eleseer where the Vault is at the end of the game, DO NOT enter the Vault without first finding and killing the Opha Superior. Just look everywhere around the area, it's only small.