this is not really a guide, just a few tips:
-I recommend completing all missions in a single save:
-if you complete the campaign in legendary unlocks at the same time this and
-if you block in a places or you want to end the campaign quickly: the run of nak3d elihttps://m.youtube.com/playlist?list=PL4RoBZrNqFcoc0lcgUrlG5a...
It s possible to get with scarab skull