Survive increasingly challenging waves, unlocking new weapons and buildings as you progress through time Use more than 70 weapons to fight your enemies Build 16 different defenses, such as the Archer Tower, Drone, Paratrooper Hangar and many other structures that advance through time Recruit allies to assist you in combat Receive rewards and purchase permanent/in-game passive upgrades to strengthen allies, buildings and even weaken enemies Face dozens of random events. Vikings, vampires, bounty hunters... You never know what might come next Fight 12 unique bosses and other powerful enemies Each time you play you will find different weapons, upgrades, events, bosses... Learn your strengths and win this challenge!