How to Survive Wave 20 in Castle Defender

Understand Wave 20 Challenges

Wave 20 in Castle Defender introduces stronger enemies with increased health and attack speed. To survive wave 20 castle defender, analyze enemy patterns and prioritize threats. Focus on clearing melee units first to prevent them from reaching your castle.

Optimize Weapon Upgrades

- Upgrade high-damage weapons like cannons or rockets for area attacks

- Balance between attack speed and defense range

- Save coins for critical upgrades during early waves

Pro tip: For wave 20 castle defender survival, fully upgrade at least 2-3 primary weapons before the final boss appears.

Perfect Defense Layout

Create strategic spacing between towers to maximize attack zones:

1. Place slow towers near entrances to delay enemies

2. Position damage dealers in the middle for maximum coverage

3. Save area-of-effect weapons for clustered enemy waves

Remember to leave space for emergency reinforcements during intense wave 20 castle defender battles.

Use Special Abilities Wisely

Activate hero skills at the right moments:

- Use healing potions when health drops below 30%

- Deploy AoE damage skills when enemies overwhelm defenses

- Save ultimate abilities for the wave 20 castle defender boss fight

Combine special abilities with tower attacks for maximum efficiency during critical moments.