Players use wits and strategy to protect Penguin Town by placing defensive towers to thwart hungry invaders who are stealing the fish supply. Choose from eight different tower types that release an array of environmental ammunition, such as snowballs, ice cubes, icicles and frost to deter woolly mammoths, snow men, seals, snapping turtles and more. Direct Little Blue to catch more fish and retrieve special power-ups so you can upgrade towers to increase attack range and strength as your enemies expand in size, strength and smarts.