In terms of story, we know that the game is about humans taking a last stand against a league of aliens known as the Convenant. In a last ditch effort by humanity to lure away the aliens from discovering their homeworld, humans dispatch a warship hoping the aliens will give chase. The aliens take the bait, but what unexpectedly follows during this cat-and-mouse pursuit, is that the human warship ends up encountering a ring-shaped artificial world—hence the name Halo. The crew of the ship land on the world and wage guerilla-style warfare in hopes of surviving and discovering the secret of the Halo. In this picture, we see one of those antagonistic aliens brandishing a lightsaber-esque weapon.