Zombie crowds turn some encounters into a straight-up test of firepower, but the bionic abilities keep things from becoming a one-button shooting gallery. Guns handle the steady damage, while powers are handy for thinning a mob or buying enough breathing room to escape. Free shop purchases are already unlocked in the current version, so stocking up is considerably easier.
The presentation goes heavy on the spectacle, with muzzle flashes, explosions, and packed undead waves filling the screen. There is little fuss around the premise; gear up, find your rhythm, and see how long you can keep the horde off your back.