Nah, these are the peopಞle behind Natural Selection, a mod for Half Life where you played as marines or aliens and you fought each other. Furthermore, the Kharaa virus, which is in Subnautica, comes from these Aliens, named, you guessed it, the Kharaa. Nah, they left the guns behind because of how toxic the FPS culture has become, and I don't blame them. Shame we probably will never get that crossover game though.