Knock Knock: Room Defense – Clearing Main Stage 190 Ghostly Echo

Clearing Main Stage 190, known as Ghostly Echo, requires a disciplined approach to balancing resource accumulation with constant door repairs. At this stage, the enemy swarms exhibit increased aggression, necessitating a focus on high-output damage dealers and effective crowd control to prevent the door from being overwhelmed. Players should prioritize upgrading their primary defensive hero early while maintaining a steady gold income to sustain the structural integrity of the room throughout the encounter.

Strategic Hero Selection for Stage 190

Success at this stage depends on fielding heroes capable of handling dense waves of ghosts. Because the Ghostly Echo stage features high-pressure enemy spawns, you need units that can clear mobs quickly before they reach the door.

• Prioritize AOE Damage: Select heroes who provide area-of-effect damage to thin out the swarm efficiently.
• Stalling Specialists: Use heroes with knockback or stun abilities to create breathing room, allowing your gold production to catch up with the cost of door repairs.
• Synergy Check: Ensure your roster includes at least one high-attack speed unit to mitigate the risk of being swarmed at the door.

Door Management and Resource Allocation

The primary fail state in Main Stage 190 is the destruction of the door due to neglected maintenance. You must treat door repairs as your highest priority, even over upgrading minor secondary heroes.

Execution Tips for Ghostly Echo

Maintaining a stable rhythm is critical to surviving the later waves of the stage. Many players fail by over-investing in hero upgrades while neglecting the door's health bar during intense combat periods.

• Watch the Health Bar: Never let the door drop below 50% health if possible; the window for recovery shrinks significantly once it hits critical status.
• Timed Abilities: Save your ultimate hero abilities for peak swarming times rather than using them as soon as they recharge.
• Gold Conservation: Keep a small reserve of gold at all times. Being caught without sufficient funds for a critical door repair often leads to a run-ending defeat.