Mutations

Mutations is the name for a new set of gameplay modes scheduled to appear alongside the new campaign, The Passing in Left 4 Dead 2. The Mutations are special game modes that run for one week before it is retired, and replaced by a new Mutation each week as they become announced on the in-game blog every Thursday. Presumably after all the Mutations have been revealed, a poll will be conducted once a month for players to vote for their favorite Mutation, which will return the following week.

There are over 20 different Mutations planned, and playable on all Left 4 Dead 2 Campaigns.

So far, the following have been revealed on Valve's blog:


 * Realism Versus (Versus Mode mixed with Realism Mode, favors Infected side)
 * Chainsaw Massacre (Campaign Mode only, Survivors only have access to Chainsaws with unlimited fuel)
 * Bleed Out (No information revealed, scheduled release 30th of April according to new in-game Blog Post)

Still, most Mutations are already avaible within the scriptfiles of the mode: "Headshot! - The only shot that counts is the one in the head."

"Bleed Out - Your health is a ticking away."

"Hard Eight - Double the specials, quadruple the fun!"

"Four Swordsmen - Four Swords against plenty of apocalypse!" "Ultra Realism - The ultimate realistic challenge."

"Chainsaw Massacre - 4 chainsaws, millions of zombies."

"Iron Man - No respawns, no restarts, all tension."

"Last Gnome On Earth - Protect the gnome at all cost."

"Room For One - Only room for one survivor in this rescue vehicle."

"Healthpackalypse! - No health in this versus game."

"Realism Versus - You can't see each other but they can see you."

"Follow the Liter - Scavenge one can at a time."

"Gib Fest - Blast the infected to shreds with M60s." "Versus Survival - Can you survive against your friends?" "Mutation - a Mutation of Campaign mode."

"Mutation - a Mutation of Campaign mode."

"Mutation - a Mutation of Versus mode."

"Mutation - a Mutation of Scavenge mode."

Single player only mutation modes:

"Last Man on Earth - You will become legend to the infected as the last human left."

"The Last Samurai – Alone, armed with only a sword you venture forth."

It is only available to those who have downloaded The Passing. The first mutation will be Realism Versus. 