Doomsday Zombie TD is a cool and exciting tower defense game. You aim to defend your castle from brutal enemy attacks and take down the zombie army. Depending on your defense strategy, you can upgrade your buildings, towers, arsenal, and army. Lead your army to defend the castle and kill the zombie hordes. Enjoy! Doomsday Zombie TD, tower defense game, castle defense, zombie army, tower upgrade, army upgrade, strategy game, puzzle game, mobile game, kids friendly, no blood, zombie game, tower defense, apocalypse, doomsday, defense, build, upgrade, kill zombies, castle, strategy, gameplay, tower, arsenal