Happy Halloween! Why not celebrate with a brand new game or two (or three) courtesy of Steam. If the game is scary, features zombies, or ghosts, it’s probably on sale. I mean, what are you going to do this weekend? Go to lame party party filled with a bunch of neckbeards and trashy girls? Forget that, turn off you lights, put your candy on a chair with a sign politely asking people to only take one piece and load up L4D2.