Sony is set to reveal the next batch of games coming to the Game Catalog for PlayStation Plus Extra and Premium in August, but we already know of one of them: Helldivers 2, which is now available to download. Developer Arrowhead announced that its hit action game about bringing Managed Democracy to other worlds will be available through the Game Catalog starting August 12. An influx of fresh recruits is perfect timing, as the Helldivers 2 community is being challenged to collectively…