Prepare for another penguin invasion in the fourth installment of the tower defense game, Penguins Attack TD. Build and upgrade weapons to prevent waves of penguins from reaching their destination on each map. Weapons include slow towers, flame throwers, tesla coils, and many more that can be unlocked. Make sure you set up your towers to deal with both ground-based enemies and enemy aircraft. Collect coins that the penguins leave behind to increase your tower-building funds.