Re: Your Brains is by Jonathan Coulton, the one who wrote Still Alive for Portal. He's also the one who made the theme song for the TV program Code Monkeys.  Oh, and he had done Re: Your Brains way before the first Left 4 Dead was out.

If you turn it on, it will play a few crappy songs, but it will eventually play Re: Your Brains by Jonathan Coulton. It's a song from the same guy who wrote Still Alive, the Portal song. Some of you may also know him as the guy who did the theme song for the TV program Code Monkeys.  Most of these songs he made were for his little experiment called ...

Melee weapon is always there? Played on singleplayer and didn't see it. Computer probably took it.  I love the AK-47, but the combat shotgun is my favorite.I think I haven't seen all the guns, though.  I did find a  defibrillator, though. Never got to try it out, but it's a cool addition.

At least it's something.   I'm loving how at the beginning they sometimes give you the classic machine gun and sometimes the new one. Also how there's sometimes a melee weapon at the start, too.  I like it how the cop zombies sometimes drop nightsticks.  Edit: Liking the adrenaline shot and the boomer vile.

Downloaded it as soon as it came out. Still haven't played much, though.   I was hoping to use some of the new infected, but, of course, versus isn't on the demo. I expected it not to be, but still.  Oh, and female boomers. *shudder*