The main objective is to protect your base from waves of zombies by strategically placing defenses, upgrading your weaponry, and managing your resources effectively. Survival against increasingly difficult enemy waves is key.

Resources can be earned by defeating zombies, completing missions, and exploring different maps. Focus on upgrading your defenses and strategies to maximize resource gain as you progress through the game.

You can build various types of defenses, including barricades, turrets, and traps. Each defense type has unique strengths and weaknesses, so it's important to strategize based on the incoming zombie types.

Upgrading requires gathering enough resources first. Follow these steps to upgrade: 1. Tap on the weapon or defense you want to enhance. 2. Check the resource cost for the upgrade. 3. Confirm the upgrade by spending the resources. 4. Watch as your weapon or defense improves in effectiveness.

To survive longer, employ a balanced strategy: 1. Diversify your defenses to cover multiple attack angles. 2. Upgrade your most used weapons first. 3. Keep an eye on the resources and replenish them as needed. 4. Adapt your strategy based on the zombie types in each wave.