Destiny 2 Questions & Answers

What is the maximum value that your power level can be in Destiny 2?

The aim sensitivity seems really weird for me on PS4. The aim feels a bit sticky where it starts moving really slow, even if I have the stick pushed over fully, and then it will speed up after a second. Seems really weird to use it like this. 

I have been reading guides where people are suggesting a power level of X before doing some mission. What does this mean?

Purple is always for rare loot in these kinds of games so im annoyed u can’t figure out how to open them. I’ve killed 2 larger enemies and both times they have dropped a purple lockbox. How do I open these lockboxes to get the loot?