Posted on 11 March 21 at 12:16
early on in the game you get told about the renegade vault and can fast travel to it. go through that and it leads to Starving Sea. In that area there are 3 dungeons you have to beat to unlock the 4th. in each of these dungeons is a chest with the respective Shot upgrades that are needed to finish those dungeons. You cant finish those dungeons without them, so you cant miss them if you do that area, though it isnt necessary to finish the story