User blog comment:Eureka Enderborn/A dilemma I'm facing/@comment-26863727-20150831000232

You should play a level of MC's campaign then a level of Locke's. The devs have said that the MC levels will raise questions and then the corresponding Locke level will answer them, while raising questions which will be answered in the next MC level. So playing both campaigns is pretty much the only way to get all the pieces of the puzzle.