Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
Fixed original survivors cheating in Bleed Out mode by throwing first aid kits

Exploits.

- When you spin around when a jockey is riding you, you stay still and the jockey becomes useless.

Chainsaw Massacre (CP) – Also known as Chainsaws. No weapons will spawn. Players will be given chainsaws with infinite gas to use for the entire campaign.

Bleedout (CP) – In this game mode you are given only temporary health, which reduces at a speed much faster than normal. No health kits will drop, however, pills will spawn very frequently. The game will also increase the amount of random panic events in an attempt to catch you off guard.

Last Gnome on Earth (CP) – Also known as Guard the Gnome. Gnome Chompsky will spawn at the beginning of the campaign and must be carried to the end of the campaign to win. Zombies will only attack the player carrying the Gnome.

First Man Out (CP) – If one survivor dies, the entire campaign is lost.

The Four Swordsmen (CP) – No weapons will drop, each player will be given a katana, and only special infected will spawn.

Iron Man (CP) – Also known as Hardcore. You won’t be able to respawn or restart once you die in this mode. Once you are dead you are dead and you have to restart the whole campaign.

Ultra Realism (CP) – Realism mode but even harder. Death is permanent for the entire campaign. Basically Realism and Iron Man mode combined.

Boom Headshot! (CP) – Only headshots will kill zombies, but each zombie goes down in one hit. Special infected also need to be killed with headshots.

Room for One (CP) – There is only room for one survivor in the rescue vehicle at the climax. Players will have to fight each other to be the last survivor standing while still helping each other enough to get to the rescue vehicle.

Versus Co-Op (CP) – It’s the plain old multiplayer campaign mode, but in reverse! Four A.I. bots take control of the survivors, and it’s up to you to stop them as the infected.

Hard Eight (CP) – In this mode, eight special infected may spawn at once in an attempt to kill you, as opposed to four.

Madness (CP) – Also known as SPARTAAA. 4 versus 10,000.

Boom Headshot! (CP)
Haha, this will separate the noobs from the pros. I suspect Ocram and RInox will have trouble with this