Rainbow Tower Defense is a strategy game that flips traditional tower defense mechanics on their head. Towers do not attack directly; instead, the “lines” connecting them serve as the primary weapon and line of defense.

Monsters and towers possess three primary colors. Lines inherit the colors of the towers they connect and blend into new hues as multiple towers are linked. Players must match line colors against incoming monsters based on color affinities to strike them down effectively.

Victory relies on far more than just connecting lines. Line positioning, color-based functional configurations, color matching synergies, and web-like defensive layouts all dictate success or failure. As enemy forces grow stronger with each wave, players must continuously redesign their defense networks to push their strategic limits.