What's more fun than video games? Easter eggs and similar things slipped in games for the sole purpose of giving you a smile (or, you know, a fowl-based zombie to kill). Halloween is quickly approaching, and as it approaches gamers have been presented with what the company calls "A Murder Most Fowl". That is, a zombie chicken, which you can identify by its green color and outstretched feather-frocked wings. The zombie chickens aren't the only addition, however, with Valve going all-out in the holiday spirit.