They probably didn't play it. IGN is it's own virus, and if one guy in the office manages to put in a bad word, it prevents the others from playing it.
Really, IGN? CoD over ZombiU or Sonic Racing Transformed? I'm not saying CoD id a bad game or anything but I got way more enjoyment out of the latter two. Personally, my favorites were Sonic and All-Stars Racing Transformed (Wii/U), KI: Uprising (3/DS).