Castle Busters Early Stage Guide: Targeting and Gold Upgrades

To achieve three-star stage completions in early Castle Busters levels, target the lower structural supports of enemy fortresses to collapse the entire building using the fewest possible shots, while spending your starting gold exclusively on basic projectile damage upgrades.

Targeting Weak Points for Cascading Collapses

Minimizing shots fired is the primary requirement for high stage ratings. Striking outer walls or individual units wastes limited ammunition. Focus your aim on load-bearing masonry, central support beams, and foundation pillars.

Target the Foundation: If a castle is top-heavy, destroying the bottom support blocks causes the upper floors to fall. The resulting debris crushes lower enemy units without requiring direct hits.
Account for Gravity: Long-distance shots experience a slight downward trajectory drop. Adjust your elevation upward to prevent shots from striking non-critical lower obstacles or missing the targeted beam.
Time Your Shots Around Moving Barriers: Enemy soldiers and moving shields can block incoming projectiles. Wait for mobile defenses to shift out of your line of sight before launching a volley so your shot connects directly with structural weak points.

Resource Allocation and Upgrade Strategy

Gold is limited during early progression. Spending currency on temporary advantages or excessive specialized ammunition will slow your forward momentum. Invest capital into increasing the raw damage output of your default shots so standard volleys can break heavy masonry in fewer hits.

Ammunition Option	Target Application	Gold Priority
Standard Projectiles	Unreinforced bases, central support beams, standard masonry	High priority; upgrade base damage output early
Specialized Ammunition	Dense layouts, reinforced materials standard shots cannot breach	Low priority; save for high-health late-zone fortresses

Avoid using premium projectiles on levels that can be brought down with standard shots. Reserve high-cost ammunition for dense, reinforced castle layouts that standard volleys cannot collapse effectively.

Step-by-Step Stage Execution

Follow this sequence when entering a new stage to maximize efficiency:

Inspect the Architecture: Locate the primary support pillars and load-bearing beams holding up the highest concentration of structure and enemy units.
Track Defensives: Watch the movement cycles of any mobile enemy units or shields to establish a clear firing window.
Execute Base Strikes: Fire your upgraded standard projectiles into the foundation to trigger physics-based chain collapses.
Evaluate Upgrades on Failure: If a stage requires more shots than the three-star threshold allows, pause progression to upgrade your baseline projectile power before retrying.