DEFENDIN' DE PENGUIN is a kid-friendly spin on the "Tower Defense" style of strategy games, where gameplay typically consists of players having to defend a town by placing siege towers and other defenses along the roads leading into it to repel waves of enemies. The game stars Little Blue, a plucky penguin who, with the help of Professor Profi's inventions, defends penguin villages in the arctic from animals who are trying to steal their fish.
A typical level is laid out with a town in the center and roads leading in and out of it. Waves of animals –- such as walruses, turtles, bears and wolves –- will start to walk down the road towards town. If too many animals are able to pass through town and escape with a stolen fish, you'll lose the level. Players must repel the animals by strategically placing towers along the roadside that hurl projectiles like ice cubs, icicles, snowballs, and even snowmen at them until they become stunned and disappear. Each of the nine tower type has a different range, speed and effectiveness (ice cube towers, for example, are effective against hard-shelled animals like turtles, while icicle towers are particularly effective against walruses). Towers can be upgraded to make them stronger, and players can control Little Blue to run around and pick up extra coins, power-ups, and fish.