On certain maps, the path of the aliens can be blocked by building towers, forcing them to find another route to the cores. (psnstores.com)
I'd love to see a mode where they incorporate the animals / beasts in certain maps rather than just killing the AI. (jamiex66.com)
My only real complaint is that some of the maps feel a bit too big for the amount of players involved, with certain maps involving large stretches devoid of player contact. (gaming-age.com)