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:

- Next Mutation: Nightmare
- Fixed an exploit that allowed banned players to bypass the ban

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:

Changes:
- Next Mutation: Flu Season
- Removed a demo ConVar that was being used for an exploit

Dead Center 1:
- The lower windows should no longer be accessible (versus map grief).

Dark Carnival 3:
- Adjusted brush that was blocking a truck interior, to no longer block the truck interior.
- Adjusted the rollercoaster event start to make it more difficult to skip.

Hard Rain 2:
- Adjusted blockers on the pipe-hop shortcut to provide better coverage.

Hard Rain 1/5:
- Adjusted blockers to better cover the added box which itself covers an invincible spot.

The Passing 1:
- Added blockers for survivors along the railings in the upper areas to prevent them from leaving the map or getting stuck out of bounds

Today's update includes fixes that will be coming to the Xbox 360 in a future update.

Dead Center:
The Hotel:
- Made dropping between the top two floors much more difficult.

The Atrium:
-Survivors should no longer be able to jump onto the vending machines near the start of the map, as AI infected could not see or path to this area.
-Blocked Survivors being able to stand on the map placard, as this was a spot where infected could not path to.

Dark Carnival:
The Highway:
-Survivors should no longer be able to jump on top the truck near the ending saferoom, as AI infected are unable to attack survivors there.

The Fairgrounds:
-Survivors can no longer climb on top of an early set of generator lights.
-Made dumpster near the first warehouse session into a static prop to prevent grief blocking map progress.
-The forklift near the entrance to the building leading to the silly slide has been removed.
-Blocked survivors being able to stand on a maintenance structure near the back wall by the carousel, as AI infected were unable to see survivors if they zombie-hopped their way up there.
-Blocked top of the back wall next to above for the same reason.
-Blocked a hop up on a light post base where survivors in VS could glitch their way to 100% map completion.

The Coaster:
-Blocked access to a stuck spot behind some stairs in the swan maintenance room.
-Blocked survivors being able to jump on the shelf next to the stuck spot. Infected were unable to see survivors standing there.
-Blocked being able to climb into the shelved swan in maintenance, as infected could not see survivors that were there. Additionally, it is very difficult to get out of it this swan once you're in.
-Blocked access to the top of the truck just outside of the coaster area for survivors.
-Blocked survivors from jumping on to several electric box props shortly before the coaster event, which could be used as invincible spots.
-Blocked a method of climbing and skipping the roller coaster event start.

The Barns:
-Blocked survivors being able to be knocked into the infected-only trash area next to the covered picnic area near the start. Players knocked over this fence could not make it back.

The Concert:
-Blocked survivor access to the windows above the concert to remove an invincible spot.


SWAMP FEVER:
Plank Country:
-Added a bunch of dock props to break up a pair of invincible spots at the ferry panic event.

The Swamp:
-Skipping the airplane event should now be much more difficult.


HARD RAIN:
The Sugar Mill:
-Blocked a hop-up onto some pipe-work that allowed survivors to skip the conveyor belt section.
-Blocked access to a very tiny ledge opposite the elevator at the holdout event, which was an invinicble spot.

Mill Escape:
-Blocked survivors being able to jump onto the roofs near the start which allowed them to avoid the sugar cane field altogether.

Town Escape:
-Added a props to block access to a table in the restaurant, which was an invincible spot.
-Blocked survivors being able to climb on top of the generator, another invincible spot.
-Removed an invincible spot off the dock.


THE PARISH:
The Waterfront:
-Added a few props for infected to climb out from a garden area behind a wall, which had previously been inescapable.

The Park:
-Blocked survivors from jumping on to the generator and the tops of the metal fences just after the park area, removing an invincible spot.
-Blocked access to an out-of-map exploit area which was reachable by climbing an electrical box prop.

The Cemetery:
-Blocked survivors getting on top of the white trucks near the end of the alarmed car lot, as these were invincible spots.
-Blocked survivors from jumping the fence from the shed into inescapable infected-only territory following the bridge explosion.
-Blocked players following the highway to the end of the map, which led to a spot where players could get under the map.

The Quarter:
-Blocked being able to hop back up a one-way drop following the pool hall.
-Blocked survivor access to the landing exiting the parade float event zone until the event itself has been started.
-Blocked player infected from perching in a high window in the ending safe room, which could prevent a VS round from ending.


THE PASSING:
The Riverbank:
-Block infected ghost players in VS from getting under the map by crossing the bridge at the start.
-Block infected from leaving map bounds by going beyond the first area, and slipping past the water kill brush.
-Block survivors jumping the fence just after the first interior, allowing them to leave the map bounds.
-Block an out-of-map exploit near the wedding party area.
-Block an infected out-of-map exploit near the safe room.

The Port:
-Survivors will no longer be able to stand on the indoor generator and access rooftop areas.

THE SACRIFICE:
The Port:
-Survivors will no longer be able to stand on the indoor generator and access the rooftop areas.

NO MERCY:
The Apartments:
-Adjusted player blocker for the corner drop safe-landing at the start to be slightly larger.
-Added blockers to both air conditioning units near the start to prevent survivors from using them to skip the apartments.

COLD STREAM:
Cut-Throat Creek:
-Fixed a stuck spot in the rocks above the river tank fight.

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:

- Next Mutation: Last Man on Earth

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:

- Next Mutation: Versus Survival

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:

- Temporarily removed a change that broke a ladder in Dark Carnival.

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:

General:
-Fixed survivors being able to climb some infected-only ladders

No Mercy 1 – Apartments:
-Survivors should no longer be able to fall into the street-level infected-only area from the starting rooftop -Players should no longer be able to drop down onto the invisible brush at the corner.
-Survivors should no longer be able to incapacitate themselves by jumping toward the electric box prop opposite the starting rooftop. It should now be fatal

No Mercy 2 – Subway:
-Players should no longer get stuck when in the back corner underneath the starting safe room -Survivors should no longer be able to jump onto the tiny ledge on the side of the building following the door/generator event -Made the piano near the ending safe room into a an immobile, static prop to solve an issue with infected players using it to block the safe room.

No Mercy 3 – Sewer:
-Survivors who somehow manage to get on top of the gas station should no longer be able to leave the map.
-The work light at the mid-way point in the sewer is now an immobile, static prop to solve an issue with infected players using it to block survivor progress.

No Mercy 4 – Hospital:
-Added the missing "breakable" decals to the breakable wall in the second part of the stairwell.
-Made the breakable wall in the second part of the stairwell breakable to all infected.
-Survivors should no longer be able to enter the infected-only vents and passages above and near the elevator event.
-The two tank-only breakable walls in the upper, under construction floor into can now be broken by any infected.

No Mercy 5 – Rooftop:
-Added several props to cover and remove an invincible spot on one of the lower tiers of the rescue rooftop.

Cold Stream 4 – Cut-throat Creek:
-Fixed infected not being able to path to survivors when standing in the boat near the tank fight.

Updates to the Left 4 Dead SDK are now available. The updates will be applied automatically when your Steam client is restarted. The major changes include:

- Fixed the preview window in modelbrowser.

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:

General:
-Fixed missing steam avatars in transition panel.
-Witches on fire will now continue to attack instead of sometimes flailing around aimlessly.
-When infected players slash at a jockeyed survivor, all damage will be applied to the survivor and not the jockey.
-Added some missing music files for the L4D1 campaigns.

Crash Course 1:
-Rescue closet doors that are blocked in versus are now inaccessible to both teams.
-Fixed the area portals near the howitzer event. Players should now be able to see through the infected-broken holes in the walls properly.

Crash Course 2:
-Rescue closet doors that are blocked in versus are now inaccessible to both teams.
-Removed a bad item cluster in the finale which was causing too many items to spawn.

Dead Air 3:
-Fixed an AI bot pathing issue with climbing the fence leading into the construction yard.
-Removed the ability to climb an electric box prop near the barricade in the construction yard. It should no longer be possible to skip the barricade event.
-Added an infected ladder to some pipes on the far side of the barricade to create a route for player infected on that side to easily enter the construction yard.

Blood Harvest 4:
-Widened the gap in the railing on the final bridge.
-Falling off the cliff or the final bridge is now fatal to both teams.

Blood Harvest 5:
-Fixed a potential bug for low-end machines where certain walls and textures near the starting safe room would vanish in certain views.


Cold Stream 1:
-There is now only a single hunting rifle in the cabin after the rope bridge.

Cold Stream 2:
-Moved the magnum near the start of the map, nearer to the other tier 2 weapons.
-Tier 2 weapons near the start of the map are no longer single-spawn.
-Adjusted cars and road props to reduce the chances of players getting caught on geometry.
-New infected ladders added.
-Added a weapon spawn in the tent on the barrel explosion bridge.
-Fixed an exploit that allowed survivors to climb the tent on the bridge to skip the barrel explosion event.
-Added an M60 under the barrel explosion bridge.
-There are now slightly more infected coming at slightly faster intervals during the end-level onslaught.
-Fixed a bug where players and infected could get caught in the geometry along the walls in the tunnel leading to the stairwell during the onslaught.
-Several minor visual tweaks and bug fixes for performance throughout the map.
-Added wrong-way signs to indicate when infected players have reached the end of the playable parts of the map.
-Fixed several spots where players and AI could get stuck.

Cold Stream 3:
-Added a new, much more obvious path across the tanker explosion gap.
-Tweaked the wooden catwalk area following the tanker explosion to make it easier for survivor and infected AI, as well as infected players, to navigate.
-The water now has a new texture effect which will work on low end machines.

Cold Stream 4:
-Fixed a melee weapon that liked to spawn inside of a table near the start of the map.
-Fixed a case where AI infected would sometimes get stuck trying to mount the drain to climb up toward the start of the map.
-Consolidated items in the tank fight area at the halfway point.
-Altered tank fight area in the stream so that AI tanks don’t spawn in nearly useless/sitting duck locations.
-Removed one of the triage tents and replaced it with an open trash/storage area.
-Added a pair new routes up the final tower for infected players to reduce AI common infected collision and pathing issues, and to give infected players more strategic options.
-Several prop adjustments for players using low-end settings.
-Added wrong-way signs to indicate when infected players have reached the end of the playable parts of the map.

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:

Blood Harvest Campaign:
- Item density revision.
- Several minor bugs fixed.

Blood Harvest 3:
- Fixed a potential exploit where survivors were able to jump to onto the cliff side prior to the train onslaught.
- Added tooltip to prompt players to fight to the safe room when the onslaught begins.

Blood Harvest 4:
- Changed the lights on first large train depot building to be non-solid, to prevent survivors from being able to jump into the upper windows.
- Moved a bookshelf in front of a window on the ground-floor of the last building in the level.
- Adjusted the slope of the concrete that makes up the bottom section of the last building in the map so that players slide off of it. It was previously used as part of an exploit to skip content.
- Doubled the height of the fence that leads around the last building in the map to prevent players from skipping the final building.
- Added tooltip to prompt players to fight to the safe room when the onslaught begins.
- Added new a new spawn location on the final bridge for infected.
- Removed a piece of railing along the final bridge to create an opening for infected attacks.

Blood Harvest 5:
- It should now be much harder to get stuck inside of the APC when it arrives.