Unit Optimization Guide

Maximize your defense efficiency with optimal unit placement, upgrade priorities, and resource management.

Unit Placement Optimization

Place units on the front cars of the train for maximum range and firing time. Units here engage enemies earlier and more frequently.

Position AoE units where they have clear line of sight to the center of the track to maximize splash damage effectiveness.

Place non-essential structures at the edge of train cars to bait zombie attacks away from your main damage-dealers.

Always prioritize upgrading existing units to their maximum level before placing new, weaker ones. Upgraded units provide better value.

Upgrade the Gem early to unlock advanced unit slots. This is often more valuable than buying multiple weak units.

Prioritize upgrading AoE units for late-game survival. Single-target units become ineffective in later waves.

Use your shovel in early game to personally farm gold. Transition to full automation as you progress.

Compare the high-risk/high-reward 150g Crates against guaranteed Gem upgrades. Early game, focus on guaranteed progression.

Balance between buying new units, upgrading existing ones, and upgrading the Gem. Plan your economy for long-term success.