L4D Official Blog

Left 4 Dead - Update

Wed, 06 May 2026 18:02:00 +0000

An update has been released for Left 4 Dead: - Fixed several exploits that could be used to crash servers or remote players.

Left 4 Dead 2 - Update

Thu, 18 Feb 2021 22:17:00 +0000

An update has been released for Left 4 Dead 2. - Quick Match option for all modes allows players to prefer "Official Servers Only" or "Any Servers" - Added localized UI and subtitles for Vietnamese - Increased string commands per second limit to fix some false disconnects - Prevent manually initiating some talker responses that trigger longer conversations - Fixed color correction for some maps where it was missing or incorrect - Fixed melee animation while carrying a fireworks crate - Fixed M60 not using the correct walk calm animation - MP5 changed to the slightly better rifle reload animation - SG552 changed to use assault rifle animations and military sniper zoom animations - Fixed incorrect sound cue for player infected when a survivor dies - Changed some mob onslaughts to classic panic events in the L4D mutation - Boomer bile slows tanks in Tank Run mutation - Several Rocket Dude mutation fixes and performance improvements - New survivor alert response rules for intense combat situations - Scripting: • Fire the "KilledZombie" response concept when killing a Witch. • New "EntityOutputs" class containing functions to manipulate entity output connections. ○ GetNumElements, GetOutputTable, HasOutput, HasAction, AddOutput, RemoveOutput • Expanded response rules testbed.

Left 4 Dead 2 - Update

Fri, 18 Dec 2020 17:45:00 +0000

An update has been released for Left 4 Dead 2. - Fixed survival stats getting reported during demo playback - Fixed response rules "campaign" criteria not recognizing DLC campaigns - Enabled stats reporting for CS weapons - Fixed some caption colors - Updated Spanish translations - Fixed talker typo - Script Functions: • "ForceVersusStart" to force start the versus round. • "ForceSurvivalStart" to force start the survival round. • "ForceScavengeStart" to force start the scavenge round. • "QueueSpeak" (hEntity, szConcept, flDelay, szCriteria) to queue a speech concept • "RushVictim" (hVictim, flRange ) to force all common zombies in range to rush the victim. If hVictim isn't set, a random survivor will be chosen.

Left 4 Dead 2 - Update

Tue, 08 Dec 2020 17:24:00 +0000

An update has been released for Left 4 Dead 2. Script: - Global: "LocalTime" Fills out a table with the local time - Player: "IsSuppressingFallingDamage" returns true if falling damage is currently suppressed for the player - Run optional script "response_testbed_addon.nut" for all active addons - Don't report addon file collisions for "sound.cache" Other: - Fixed talker typos - Minor fixes to RocketDude and Taaaank! Mutations - Enabled game stats reporting for DLC content - Removed a legacy vpk loading path that allowed malformed vpks to crash the game.

Left 4 Dead 2 - Update

Tue, 01 Dec 2020 19:46:00 +0000

An update has been released for Left 4 Dead 2. Script additions: - Added "Inflictor" field to damage table for "AllowTakeDamage" - Director function "WarpAllSurvivorsToCheckpoint" - Director function "WarpAllSurvivorsToBattlefield" - Director function "WarpAllSurvivorsToFinale" Other: - Updated RocketDude mutation to version 1.7. - Fixed some typos in talker scripts.

Left 4 Dead 2 Update

Thu, 19 Nov 2020 03:06:00 +0000

An update has been released for Left 4 Dead 2. - Honorary achievement for Gnome Chompski's upcoming journey into space on Rocket Lab's "Return To Sender" mission.

Left 4 Dead 2 - Update

Wed, 04 Nov 2020 21:39:00 +0000

An update has been released for Left 4 Dead 2. - Fixed a regression that caused map exploit fixes to appear in co-op modes again.

Left 4 Dead 2 - Update

Tue, 03 Nov 2020 23:14:00 +0000

An update has been released for Left 4 Dead 2. - Fixed The Last Stand's Village Scavenge map not having any weapons. - Recompiled common infected materials to fix visual errors on Linux. - Removed alarm glass from a non-alarm car. - Fixed Special Infected being able to trigger the helicopter flyover when leaving the bumper car building on Dark Carnival Barns. - c7m1 and c12m5: Fixed a few nav issues that caused tanks to get stuck. - c1m1: Marked all areas outside of building on ground as not allowing any spawns. - c11m5: Marked a few areas near the plane crash fire as no-threat to prevent tanks from spawning too close to the fire.

Left 4 Dead 2 - Update

Thu, 22 Oct 2020 17:25:00 +0000

An update has been released for Left 4 Dead 2. - Fixed a long-standing ragdoll crash, caused by stale bone data after toggling addons that override common infected models.

Left 4 Dead 2 - Update

Wed, 21 Oct 2020 18:26:00 +0000

An update has been released for Left 4 Dead 2. - Fixed a crash when decoding bones. - Fixed a mesh error when drawing the crosshair with colorblind mode active. - Fixed a double-add of the client shadow manager restore function. - Fixed mode-only addons sometimes getting removed on map load. - Fixed some military sniper activity names. - Changed crowbar and pitchfork to slash damage only. - "AllowFallenSurvivorItem" can be called outside of mutations. - Talker and survival updates.

Left 4 Dead 2 - Update

Wed, 14 Oct 2020 20:14:00 +0000

An update has been released for Left 4 Dead 2. Last Stand: - Fixed ammo pile in Junkyard not spawning on second round of Versus. - Fixed exploit where the trigger used to quiet the Director could be activated after the finale started. Survival: - Fixed an issue where Fallen Survivors could still drop medkits on Riverbank. - Fixed issue where several weapon spawners would absorb dropped weapons on Barge. Tank Run: - Fixed an issue in Scavenge finales that prevented the escape vehicle from working. - The Sacrifice finale will now spawn Tanks properly and the bridge will lower when the timer reaches 0. RocketDude: - Fixed players ending up with no viewmodel and no avatar by rejoining a game where any survivor already left the safe room. - Added support for custom playground maps ( a guide will provided by ReneTM ). - Fixed players not instantly dying when jumping into c14m1 safe room water area. - Fixed players not instantly dying when jumping into c14m2 finale water. - Lowered slow motion probability from 10% to 5% as requested by many players. - Fixed RocketDude decals sometimes not showing up. - Fixed new best times not saving. - Added Start and finish textures. Other: - Updated several Mutations to fix the issue where the weapons in Whitaker's Gun Store weren't being removed or converted. - Fixed tanks failing to spawn in versus on No Mercy 3 (at 90+% boss flow). - Fixed tanks spawning before the finale on No Mercy 5. - Fixed a few stuck Special Infected issues on survival maps. - Fixed setting the input mode to joystick/Steam Input. - Increased command limit before causing a disconnect. - Fixed some reported model crashes.

Left 4 Dead 2 - Update

Fri, 02 Oct 2020 16:47:00 +0000

An update has been released for Left 4 Dead 2. - Fixed "New Haircut" achievement to not allow club-type melee weapons. - Additional prevention of getting disconnected when spamming the scroll wheel. - In Survival mode, if a special infected reports as stuck for more than two minutes it will suicide. - Compiled captions and subtitles from dlc1. - Fixed a couple instances where tank could spawn outside the warp check zone (but was intended to be warped) - Added nav in ground in outer areas so that throwing a bile out there doesn't cause infected to just stand around. - Blood Harvest 2 Warehouse Survival: shortened a nav blocker next to some stairs. - Check for Realism in addition to Coop base mode for all exploit fixes to prevent some shortcut fixes from spawning in Realism Coop. - Moved 64 exploit blocks to Versus-only, most notably Dark Carnival 3 Coaster, Parish 5 Bridge and Dead Air 2 Crane. Rocket Dude: - removed PlayerUnderWater() - added Speedrunner stats ( local use only ) - improved script performance - fixed script enabling glows for projectiles on multiple ticks - removed obsolete code precaching an early dev model Tank Run: - During the finale, the double-Tank spawns are now set to 40 seconds instead of the normal 20 second timer. Versus: - Increased max ghost spawn timers to 24 seconds. - Fixed witches time to kill on incapacitated survivors being faster than intended - it should now take the same time as pre-update. Survival: - Cane Field: Moved the ammo pile on the roof slightly. - Float: Removed the ammo pile inside the house at the bottom of the stairs. - Generator Room: Fixed ZombieDiscardRange not working properly. - Crash Course Bridge: Marked nav areas behind a fence as NO MOBS. - Gun Store: Clipped exploit area above barricades where infected wouldn't path to the Survivors. - Cold Stream Junkyard: Removed alarmed car that's out-of-map. - Terminal: Fixed ZombieSpawnRange not working properly. - Waterfront: Blocked additional nav areas in an alley to prevent the Tank from getting stuck. Versus Survival: - The train door will now automatically open when the countdown timer reaches 0 on Train Car. c1m1: - Fixed issue where survivor bots refused to path through the kitchen fire area. c1m3: - Moved an exposed stairwell hurt trigger down inside a vending machine to stop it from killing players. c2m2: - Fixed a forklift being breakable by survivors c3m3: - Slightly adjusted an infected ladder to improve usability c4m1 + c4m4: - Blocked survivor access to a rooftop next to the playground commonly used to grief - Added a ladder from map 2/3 for consistency between maps and to help players who fall off the safe room roof c5m2: - Added an infected ladder to get out of a stuck spot - Added a hittable dumpster behind the bathrooms in the park - Replaced a prop ladder on top of the bus station with an infected ladder c5m3: - Replaced a prop ladder with an infected ladder (behind the fence immediately after survivors drop towards the cemetery) - Added an extra ladder to the above mentioned fence c7m1: - Fixed grenade launcher spawns having an incorrect count. c8m1: - Added a clip to prevent players movement being obstructed by a ladder near the car alarm c11m1: - Added wrong way signs above the greenhouse safe room Last Stand: - Fixed rescue closet spawns in the Junkyard so Survivors don't get stuck in the floor or wall.

Left 4 Dead 2 - Update

Mon, 28 Sep 2020 23:25:00 +0000

An update has been released for Left 4 Dead 2. - Reoriented some of the new HUD images - Updated several nav meshes based on feedback - Fixed a bug where a door model was lacking prop data - Fixed spontaneous muzzle flashes on certain rifles when playing online - Adjusted knife's attack delay - Fixed c10m3 versus survival tank spawn issue - Fixed stuck spots on a few survival maps - Various other fixes to the nav mesh from feedback - Fixed a typo in one of the new shotgun sounds - Fixed material sorting issues with skin mods on Molotov world model Achievements: - Only award "Fat Ninja" for a direct vomit attack, not a boomer explosion. - Fixed "Golden Freeman" not awarding pickups on dedicated servers. - Award survival medals to the entire team, including dead players. - Fixed "The Big Ten" and "Supreme Survivalist" not unlocking on dedicated servers. - Only award "The Last Frontier" on the Last Stand campaign. - Don't award Survival achievements in Versus Survival and vice-versa Survival: - Waterfront - Removed cars outside the playable area to prevent infected from getting stuck. - Generator Room - Increased ZombieDiscardRange. - Church - Removed Laser Sights. - Streets - Swapped the Military Sniper and the Ammo Pile spawns around. - Warehouse - Removed mortar bags from under some stairs. - Cold Stream Junkyard - Removed Laser Sights. Versus Survival: - Made it so the plane crash will trigger if the countdown timer reaches 0 on Runway. - The Save 4 Less store door will now open when the timer reaches 0 on Gun Store. - The alarmed door will now open when the timer reaches 0 on Warehouse. Tank Run: - Updated finales so rescue timer won't appear in Scavenge finales (you need to collect all the gas cans). - Fixed The Sacrifice finale not working properly. - Two Tanks will now spawn at once during the non-Scavenge finales.

Left 4 Dead 2 - Update

Sat, 26 Sep 2020 21:20:00 +0000

An update has been released for Left 4 Dead 2. - Fixed some materials and models that were causing errors in workshop content. - Reduced CS weapon spawn chance. - Safe room intros will now continue regardless if anyone leaves the safe room. - Fixed some witch call-outs - Lit Bill's cigarette Last Stand Junkyard - Reduced intensity of horde spawned from generators. - Versus Mode: Added an ammo pile near the mechanic shop. - Versus Mode: Added a fire axe spawn to the safe room. Last Stand Lighthouse - Reduced intensity of horde during the Scavenge event.

Left 4 Dead 2 - Update

Sat, 26 Sep 2020 00:03:00 +0000

An update has been released for Left 4 Dead 2. - Fixed voice data overflow on servers. - Fixed carried prop collision to not interfere with bot movement. - Fixed laser-sighted weapon spawn exploit in the gun shop. - Reduced some ambient dialog frequency.

Left 4 Dead 2 - Update

Fri, 25 Sep 2020 17:38:00 +0000

An update has been released for Left 4 Dead 2. - Prevent a server crash when using voice chat. - Prevent gas can tunneling. - Fixed an animation bug with weapon melee. - Updated localizations - Updated Rocket Dude mutation.

The Last Stand Free Weekend

Thu, 17 Sep 2020 17:38:00 +0000

Left 4 Dead 2: The Last Stand Community Update is shipping September 24th, and we're celebrating with a free weekend!

Grab your friends and tackle the zombie horde in over twenty new survival arenas, four new scavenge arenas, and a campaign based on The Lighthouse survival map. New achievements, melee weapons, animations, dialog, competitive balance adjustments, and other surprises round out this official update for Left 4 Dead 2 created by the community, for the community.

Take a look at the new trailer here.

Coming Soon: The Last Stand

Wed, 26 Aug 2020 23:09:00 +0000

It has been many years since the infection first hit. Radio silence, no sign of life, nothing but lingering hopes... CEDA is not going to save us. But there is hope! A few brave souls have continued the fight against all odds, and soon we can all benefit from their resilience.

"The Last Stand" is an update for Left 4 Dead 2, created by the community, for the community. Additional details will be coming soon.

Until then, check out the teaser trailer and prepare to make your Last Stand.

Left 4 Dead 2 Authoring Tools - Update

Mon, 13 Jul 2020 20:01:00 +0000

An update has been released for the Left 4 Dead 2 Authoring Tools. - Fixed the Workshop Manager failing to display any workshop item with an ID too large to fit into 32 bits.

Left 4 Dead 2 - Update

Fri, 26 Apr 2019 18:44:00 +0000

An update has been released for Left 4 Dead 2. - Fixed a potential remote code execution exploit. Reported via HackerOne.

Left 4 Dead - Update

Fri, 26 Apr 2019 18:28:00 +0000

An update has been released for Left 4 Dead. - Fixed a potential remote code execution exploit. Reported via HackerOne.

Left 4 Dead 2 - Update

Wed, 27 Mar 2019 17:32:00 +0000

An update has been released for Left 4 Dead 2. - Fixed a spectate command exploit that caused servers to hang. - Fixed lobby chat messages not appearing on Linux.

Left 4 Dead - Update

Thu, 14 Feb 2019 23:28:00 +0000

An update has been released for Left 4 Dead. - Dev command 'director_log_scavenge_items' can only be executed by the server. Reported via HackerOne.

Left 4 Dead 2 - Update

Thu, 01 Nov 2018 20:35:00 +0000

An update has been released for Left 4 Dead 2 - Fixed potential buffer overflow in closed captions. Reported via HackerOne. - Dev command 'director_log_scavenge_items' can only be executed by the server. Reported via HackerOne. - Protect against invalid map displacement data. - Fixed official servers allowing clients to load custom content in competitive modes.

Left 4 Dead - Update

Wed, 31 Oct 2018 21:36:00 +0000

An update has been released for Left 4 Dead - Fixed a potential buffer overflow in closed captions. Reported via HackerOne.