As you were walking, as a survivor. You suddenly heard some footsteps, and as you were completely oblivious to it. Your mouth was suddenly covered by a glove. As you suddenly heard a man 'Shush.' As you looked up, and saw a man in his 20's. And looked at his I.D, 'Gordon Freeman.'

As you both kept quiet, you both suddenly heard some.. zombies. And after a few minutes, they were gone. Phew.. But- who was he? And.. why did he save you..?