Marvel's Guardians of the Galaxy

This ability requires two ability points to unlock. It locks you in place (you can still turn and aim) while you unload a massive amount of bullets for a few seconds.

This achievement is quite easy to unlock because of how quickly this ability can kill normal enemies. You can easily kill three or four regular enemies with a single usage. It's especially effective to let enemies group up and just fire into their group. Defeat 15 cumulatively to unlock this achievement.