GameZone writes: "Left 4 Dead was a bloody thrill-ride through lands rife with zombies. When it came to a sequel, the dev team had its work cut out for it. So what was brought to the table for Left 4 Dead 2?
According to the publisher's press release:
"Left 4 Dead 2 adds melee combat to enable deeper co-operative gameplay, with items such as a chainsaw, frying pan, axe, baseball bat, and more."