🏰 Coral Harbor Blockade

Coral Harbor Blockade is a free online tower defense game set in a sunken reef stronghold, where wave after wave of raider fleet marches in to overrun everything you hold. Your job is to read the winding path, place cannon decks and mortar barges in exactly the right spots, and turn a quiet outpost into an unbreakable kill-zone. Start with the reliable Cannon Crew to thin out fast skiff scouts, then layer in the Mortar Barge so heavy ironclad units never punch through your line. Gold flows in with every kill, and a clear wave bonus rewards clean defenses — bank it to expand your grid or pour it into upgrades that double a tower's damage. The difficulty climbs steadily across all 12 waves, with a boss every fifth wave that forces you to rethink your layout instead of spamming the same tower. Slowing towers buy time, splash towers melt clustered swarms, and long-range beams finish armored stragglers, so balance always beats brute force. Everything runs right in your browser with mouse, touch and keyboard support — no download, no sign-up, just instant strategy you can pick up in seconds. Chase a perfect no-leak run, beat your saved best-wave score, and master a coral-flavored campaign that rewards smart planning over luck.

How to play

• Pick a tower from the build bar, then tap an open tile beside the path to place it.
• Towers fire automatically at any enemy that wanders into their range circle.
• Press Send Next Wave (or Space) to release the raider fleet and start earning gold.
• Spend gold on more towers, or tap an existing tower to upgrade it stronger.
• Stop every enemy before it reaches your base — each leak drains your base health.
• Clear all 12 waves, including the boss every fifth wave, to win the map.

Controls

Mouse or touch: tap a tower in the build bar, then tap open ground beside the path to place it; tap a placed tower to upgrade. Keyboard: 1-4 select towers, Space sends the next wave, P pauses, F toggles fast-forward, R restarts.

Features

• Four upgradeable coral-themed towers, each with a distinct role: rapid fire, splash, slow and long-range beam.
• A handcrafted winding path map with escalating waves and a boss every five rounds.
• Earn-and-spend gold economy with wave-clear bonuses and in-place tower upgrades.
• Smooth canvas gameplay with 2× fast-forward, pause and instant restart.
• Works on mobile and desktop with a saved best-wave leaderboard.

FAQ