Please avoid ambiguity
This thread should answer your question:
And yeah, the wording was very ambiguous, and it wasn’t until a dev confirmed the exact requirements in that thread that people understood what was really needed to get the achievement.
This thread should answer your question:
And yeah, the wording was very ambiguous, and it wasn’t until a dev confirmed the exact requirements in that thread that people understood what was really needed to get the achievement.
Then there was another response via ticket that said something else, in the same topic.
The problem with the explanation you linked is that many still cannot get it, even though they avoided said attacks. I personally can attest to having avoided every single barrage phase shot via stealth, and no achievement. This leads to confusion about the requirements, and whether or not it was a bug or not.
http://youtube.com/user/Royblazer