On a recent playthrough on easy using the Stealth Cruiser; Layout 1 The Nesasio, I tried to unlock the "Phase Shift" achievement. This achievement requires that you avoid 9 points of damage in a single cloak, to this end I fully upgraded and powered the Cloak system and used it just as I saw a lot of damage coming from an enemy ship that I counted to total more than 9, but the achievement didn't ding. I even completely dodged the third stage power surge of the boss with a cloak which should have totaled 12 damage. (I got my high score off this run though :P )
This made me think that maybe the game thought I didn't avoid 12 points of damage using only Cloak, as my fully upgraded shields and engines may have helped avoid some, most likely the shields. Did I not receive the achievement because my shields would have taken off most of that or my engines alone would have saved me?
I really want this achievement to unlock the Stealth Cruiser Layout 2 as I have found that Tactical Approach is influenced more heavily by luck (A Hazard being your only possible route at times.)