Steam News outlines a new patch that's now automatically available for Left 4 Dead 2, Valve's zombie shooter sequel. Included is the return of the "Last Man on Earth" single-player mutation, which is detailed in the Left 4 Dead Blog. The full patch notes follow.

Mutation

• Developer Choice - Last Man On Earth

UI

• Added vote option to enable All Talk in Versus.
• Added vote option to Restart Chapter in Versus.
• Added the ability in the lobby for all players to vote on starting the game.

Gameplay

• Removed Defibs and First Aid Kits in Realism Versus. Survivors start with a First Aid Kit, but all world spawns are disabled.

Addons

• To avoid conflicts between Community Campaigns, only content vpks get loaded when starting a campaign.
• Added console command "show_addon_load_order" that prints out the order of loaded vpk files.

Authoring Tools

• VPK files now support their own sound.cache file.
• Use the command "snd_buildsoundcachefordirectory " to create the sound.cache file that you should include when you create your vpk file.