These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Battle Engine Aquila
That One Boss: The Fenrir, which has a powerful laser beam that can kill you in three hits, and it's hard to dodge. And it appears in the middle of a long mission, so each time through you have to fight off a few landers before the fight starts, and when you do kill it you've still got a lot of fighting ahead of you. On a mission with no repair pad.