Thanks to the official Left 4 Dead blog, we now know the ESRB's rules for how many gnawed off human fingers one can highlight on a video game box: exactly one.
According to an update to the official blog, courtesy of "L4D Team," the Entertainment Software Ratings Board apparently thought that having a chewed off pinkie and ring finger in addition to the gobbled up thumb, as seen on the original Left 4 Dead, was going a little too far. Left 4 Dead 2 will have to stick to the "one for the thumb" ESRB bylaw for its box art.
UPDATE: Ars Technica has visual proof of that clearly over the top violation of the ratings board's ruling from E3, which looks like another 11th hour change. Frankly, we're all a little upset about this modification to the creator's original vision and will formalize our box art boycott plans as soon as is humanly possible! Grr!
Rules of Thumb [L4D]