Build a huge horde of monsters and seize all the shelters from humans. If the enemy proves too strong, fling giant monsters into battle. Summon a countless zombie horde, or wake up the speedy witch and have your enemies torn to shreds in a blink. Now you can turn weak monsters into enormous giants right in the middle of a battle or imbue them with incredible strength and speed. Combine a host of abilities with monsters and take over the entire FortressTD universe.