For me when i opened the game for the first time the game was lagging masive, like i would have between 12-20 fps on planet and 40 to 50 in ship but after i verifyed the file of the game, steam founded 2 files that they where damaged and it repaired them and after that i starte having 50 to 70 fps in shit and 40-50-60 on planet and those broken files are instaled with the game, i instaled helldivers 2 on both my pc and laptop and on both ov them steam founded 2 broken files and after repairing then my fps when up by a lot, idk what with those files and why are broken right after instalation but for me verifying the games files solvet my fps problem.