Sea Bastion: Defend The Island

Hoist the colors and hold the line! Sea Bastion is a 3D pirate tower defense game where a lone island fortress stands between the open sea and a tide of raiding ships. Build your cannons, upgrade your walls, and turn back raid after raid of ruthless corsairs.

Every raid hits harder than the last. Place the right weapon on the right slot, aim down the coastline, and watch broadsides shatter the enemy fleet before it reaches your shore.

BUILD YOUR BASTION
Line the causeway with cannons, mortars, blunderbusses, and the mighty Royal Cannon. Every weapon has its own range, arc, and punch — mix and match to cover every angle of attack.

MASTER EVERY WEAPON
- Cannons for steady, reliable fire
- Mortars that lob shells over the walls onto packed decks
- Blunderbusses that tear through close-range swarms
- The Royal Cannon — a devastating finisher for boss raids

🌊 SURVIVE THE RAIDS
Face wave after wave of pirate ships, then brace for towering boss raids that test everything you've built. Read the sea, upgrade between raids, and hold your ground.

🏝️ EXPAND YOUR ISLAND
Grow from a small stronghold into a fortified sea bastion. Unlock new tower slots, expand your island across tiers, and unlock stronger defenses as you climb.

BUILT TO LOOK GREAT
Real-time 3D battles, dynamic lighting, cannon smoke, splashing shells, and a hand-crafted pirate world — tuned to run smoothly on phones.

EASY TO PLAY, HARD TO MASTER
Tap a slot, place a weapon, and you're defending in seconds. But surviving the late raids takes real strategy: positioning, upgrade timing, and knowing when to save your Royal Cannon.

KEY FEATURES
• 3D pirate tower defense action
• Dozens of raids with escalating difficulty and boss battles
• Multiple upgradeable weapons and defenses
• Island expansion across multiple tiers
• Quick sessions — play in short bursts or long sieges
• Designed for one-handed landscape play

Can you hold the sea bastion until the last raid? Command your cannons, defend your island, and become the terror of every pirate who dares approach.

Download Sea Bastion now and defend your shores!