Humanoid

This dream started as a nightmare. A pretty terrifying one. There was a person in bed, in a dark bedroom. She (I think it was a girl) started "changing" into a horrific monster, like in "The Thing". I think it attacked me. Next thing I remember, we are in a supermarket, and the thing is attacking me. I gained courage somehow, and remember getting pretty savage. I think I poked its eyes out with my fingers, and shoved my hand in its maw (it had a humanoid head, but slimy grey skin and huge teeth). I did not feel pain, despite obviously being bitten, and I did not expect to feel it, either. A subconscious sliver of realization that this was a dream? I rammed the creature into a glass... what do you call it... the glass doors of a refrigerated cabinet where you have all the meat products and whatever are on display. Next thing I know, the "creature" is on the ground, defeated... and it turns out it is a girl on stilts, wearing a silly suit! She is crying, and people are rushing to help her. I think they blamed me, and said I hurt her. I was in some kind of "survival game", played in an outdoor arena. There were ruins, bushes and some open spaces. It started with scavenging for weapons and gear, and then staying alive. I remember wearing body armor in one session, and a backpack in a later one (I suddenly felt my armor was now a backpack). I also had an intense standoff with a woman. She had a ponytail, and a pistol, and I had a pretty semi-automatic rifle. Not an AR-15, but longer and with a smaller magazine. We aimed at each other, kind of daring each other to shoot. She back away slowly, never letting me out of her sights. I wanted to kill her, by slowly pulling the trigger. I figured if I pulled it slowly enough, she would not notice. The gun fired... but not really, because I had no ammo... luckily, she did not notice it, and disappeared. I think I discarded the empty gun, and started scavenging some random parts to build a new gun.