Valve has announced that the second campaign "Swamp Fever" will be playable at this year’s Comic Con, which is being held in San Diego on July 23-26th.

Most of us who were at E3 got to put our hands on the first campaign, "The Parish", which got rave reviews.

The game will be playable in the EA Gaming Lounge Presented by Xbox 360 from 2-9 pm Thursday-Saturday, and 12-5 pm on Sunday. The EA Gaming Lounge will be located in the Hilton San Diego Gaslamp Quarter Hotel, 401 K. Street.

In addition to the new campaign, Valve is also planning to unveil a few more of the 20-plus new items coming this November when the title launches worldwide on the Xbox 360 and PC.