Author's note: I do not own either of these creatures. I am merely an Alien and Predator fan. I will be telling you if it's either the Alien (Xeno)'s point of view or the Predator's point of view or generic.
Generic P.O.V:
It was dark. The screeching could be heard from something in this area. The lights lit up on one spot in this area of total darkness. Then one more area was lit up. Then another, and then another, until the whole area that was once pitch black was now lit up, showing the whole area which the darkness once surrounds. The area seems to be some kind of structure, man-made that had long been abandoned. Either that or the ones who used to live there were killed. The inner walls of the structure seem to be covered with some kind of secreted resin. It no longer looked as if any man made it. The screeching sounds that had been heard before, where did it come from? The answer was now right in broad daylight, or rather from the lights of the structure. Those who made the sounds could now be seen. They were hardly identifiable, blending right in to that secreted resin substance that seems to shelter them. They were black in color, a ribbed pattern on their elongated heads. Slowly they move. The patterns on the resin moved, for it was in fact part of those creatures. Something like a large, long barbed wire began to move from the walls, near those patterns, which became those creatures. It now could be identified. It was no barbed wire, but in fact the tails of those creatures. Slowly rising out of their hiding places now appears their 3-fingered claws, and their hideous skeletal patterned bodies. In the middle of the room, something else stirred. It was a shape unlike those hundreds of other resin patterns. It was much more larger, more spread out, slowly rising to reveal a shape in fact, similar to those others in the area. It had the same claws, tails, and the hideous skeletal body, only much larger. It was hanging from some kind of supporting structure. It slowly detaches itself from its support, rising on its feet, just as the hundreds of smaller ones had done. The huge creature let out an enormous hiss, and all the other ones, it's children, responded with their own hiss, filling the whole area with hundreds of hissing sounds. Something had stirred them into action, but what exactly?
Sorry if this is a little short right now. It's just the intro to the Aliens. I'll try to do the predators and continue the story from here on. Just wait for updates.