Star Hunter DX (UP)

The description of this achievement sounds a little daunting, since level 5 is an absolute nightmare, even on the lowest difficulty, but it turns out there is a much simpler way of getting this achievement.

Simply beating the boss in practice mode without dying will unlock this achievement. Any difficulty works and you can give yourself any settings you like while setting up the game, although changing the number of lives wont help of course... xD

I have found that the real difficulty of this game comes from the level themselves, and not the actual bosses, so with a little bit of practice, a no-death boss kill should be fairly doable for most people without too much effort.

Here is a video of the boss fight in practice mode. I discovered this method while trying to figure out how to get the boss escape pod to spawn, so ignore the weird approach. xD