Square TD

First 19 waves free. A ring road, eight towers with distinct roles, and forty waves where every enemy asks for a different answer. No ads, works offline.

Square TD is a tower defense with a twist: enemies run a ring road around the map, and you defend your own corner. Every wave passes your zone twice — set up, hold, and don't let them reach the castle.

• 8 tower types, 3 levels each — crossbows, ballistae, mortars, fire, lightning, poison, frost and watchtowers
• Armor, air, invisible and boss waves — every enemy type asks for a different answer.
• Synergies that matter: poison marks enemies for extra damage, frost keeps them in the kill zone, fire heats up on a held target
• 40-wave campaign on three difficulties, then endless mode for records
• Build, upgrade and sell while paused — think it through

The first 19 waves are free. One purchase unlocks everything.