Latest L4D2 Mutation is Chainsaw Massacre 

Valve has added the latest Mutation to Left 4 Dead 2, and as promised last week, it's called Chainsaw Massacre.

Available in campaign mode, with this Mutation, you're armed with a chainsaw, obviously, and instead of downing trees you will be cutting up zombies instead.

So much for gathering firewood, then.

Next week's Mutation is Room for One. Sounds creepy.

Get more information over on the L4D2 blog.

While you are there, if you look in the corner of the main picture, and brighten your screen a bit,  you will see a fuzzy image that looks like Alyx Vance holding a semi-automatic shaped like a "three".

We're kidding of course.