Don't know where he came from. All I do know though, is that he's invincible, doesn't de-spawn when you go really far away from him, and he doesn't have a gun. Say hello to Steve. I fired rockets at him, tried using bullets, fire, sharp pointy things, dense blunt things, but all to no avail.
Steve's like the Terminator, he just slowly walks towards you, even if you're in a car coming straight at him at 100mph.
Steve needs only his fists to destroy everything you love.
Nope, that didn't work either.
I think Steve and I came to an understanding afterwards, as he let me take a picture with him.
Wanna meet Steve? I'm still in the session with him. (360) Post your gamertag below, and I'll invite you.