I found a weapon called "The Hammer of Dawn." When I picked it up, the game said (via onscreen instructions) that it would only work outside with a clear signal. Interesting. So I took it outside and aimed it at a large, writhing creature that was a couple of blocks away. A thin red laser came out of the rifle. After a couple of seconds of keeping the red laser trained on the creature, I heard a beeping. Then, a satellite in the sky honed in on my target signal, and sent down a large beam that obliterated said writhing mass.
It was awesome.