What changed in Left 4 Dead 2 in 2012

A new community created campaign, Warcelona, is now available on official servers.

A new community created campaign, Warcelona, has been added to official servers.

The Left 4 Dead 2 Workshop will expand into an invite-only private beta, simplifying map downloads.

A chat session with the creators of Warcelona and Valve devs scheduled for Saturday at Noon PST.

The Left 4 Dead 2 Workshop will soon be expanded into a private beta, allowing easier access to maps.

An event featuring a chat session with the creators of Warcelona and Valve devs is scheduled for Saturday at Noon PST.

Steam Workshop is being added to Left 4 Dead 2, allowing easier addition of custom content.

New tools are being developed to help content creators design new experiences and enhance custom Mutations.

New tools are being developed to help content creators design new experiences and custom Mutations.

Steam Workshop is being added to Left 4 Dead 2, allowing easier addition of custom content including skins, weapons, and campaigns.

Achievement for helping free weekend players survive a campaign.

The entire game will be free to play for the whole weekend to celebrate Halloween.

The entire game will be free to play for the whole weekend to celebrate Halloween.

Achievement for players who help free weekend players survive a campaign.

Participate in the Gib Fest event with M60s and unlimited ammo to blast the infected.

Participate in the Gib Fest event with M60s and unlimited ammo to blast the infected.

The Cold Stream DLC for Xbox 360 will be delayed until next week.

To celebrate the launch of Cold Stream, Left 4 Dead 2 is on sale for 75% off.

The release of the Cold Stream DLC on Xbox 360 is delayed until next week.

The Cold Stream DLC is now available for PC players.

To celebrate the launch of Cold Stream, Left 4 Dead 2 is 75% off on Steam.

The Cold Stream DLC is now available for PC players.

A new Survival Mutation inspired by Karma Jockey featuring commons, beefed up Specials, no glows, and lots of fog.

A new Survival Mutation inspired by Karma Jockey featuring commons, beefed up Specials, no glows, and lots of fog.

A new Coop Mutation featuring only Boomers and Spitters with enhanced abilities.

A new Coop Mutation featuring only Boomers and Spitters, with enhanced effects.

Introducing a new game mode where you are the only Survivor left, hunted by Special Infected.

Become the last human survivor with no split screen help or Survivor bots, hunted by Special Infected.

A new game mode where teams compete to beat each other's times in rounds.

Rounds switch between teams trying to beat each other's times until one fails.

Infected spawns get quicker as the time increases during Versus Survival.

Players can vote on the next mutation: Lone Gunman or Last Man on Earth.

Infected spawns get quicker as the time increases in Versus Survival mode.

Players can vote for the next mutation: Lone Gunman or Last Man on Earth.

Rounds switch between teams as they try to beat each other's times, creating a competitive environment.

A new game mode where teams compete to beat each other's times in rounds.

Community input for upcoming mutations with a focus on Versus Survival.

DLC is in focus with minor changes still coming, release date to be announced.

Team is considering Versus Survival as the next mutation based on community feedback.

Survivors face continuous streams of Special Infected armed only with swords.

Survivors armed with swords face continuous streams of Special Infected.

DLC is in focus with minor changes and bug fixes pending before release.

Additional performance improvements for the finale section of Cold Stream.

Released bug and exploit fixes on the PC for Blood Harvest.

Face eight Special Infected at one time with increased spawning frequency.

Information will be shared with modders on improving the performance of their campaigns.

Face eight Special Infected at one time, with increased spawning frequency.

Information will be shared with modders on improving campaign performance.

Minor fixes and performance improvements for the Cold Stream campaign.

Released fixes for various bugs and exploits in the Blood Harvest campaign.

Minor fixes and performance improvements for the Cold Stream Campaign.

Improved performance in the finale section of Cold Stream on Xbox 360.

Upcoming DLC will include Cold Stream, Blood Harvest, Crash Course, Dead Air, Death Toll, and No Mercy.

New game mode where players can use M60s with unlimited ammo to blast the infected.

Upcoming DLC will include Cold Stream, Blood Harvest, Crash Course, Dead Air, Death Toll, and No Mercy.

Extensive bug fixes for Campaigns are being prepared for the Cold Stream DLC.

Players can now use M60s with unlimited ammo to blast the infected.

Extensive bug fixes for Campaigns will be updated on Steam in preparation for the DLC.