ISLAND BASTION

Buy weapons in empty slots with gold earned from destroyed ships and aircraft. Each wave approaches from an announced compass direction, shown on the map and above it; the fleet shifts at most 45° per wave through wave 5 and 90° after that. Coastal guns engage ships on their own seaward side only, AA batteries engage aircraft, and rocket silos engage anything in every direction. Destroyers are the standard warship. Fast, fragile gunboats arrive in packs of three from wave 4. Armored cruisers arrive from wave 5, hit hard and take half damage from coastal guns. Bombers arrive from wave 3 and fly in squadrons of three from wave 6. Ships patrol their side of the island while bombarding it. Aircraft make one attack run, turn back and leave toward their entry point; escaping aircraft award no gold. Combat and subsequent waves run automatically. Click or tap a slot, or use Tab and Enter, to buy or upgrade. The upgrades to levels 5 and 10 each offer two specializations, and the choice is permanent for that weapon. Coastal guns choose heavy shells or rapid fire, then wide traverse or a bunker. AA batteries choose flak bursts or long range, then fast tracking or dual-purpose fire at ships. Rocket silos choose cluster warheads or armor-piercing rockets, then twin launch or rapid reload. Gold dots under a weapon show its specializations; a glowing dot on a position means a choice is waiting. Auto-upgrade never chooses for you. Pause freezes the simulation; 2× accelerates it.

Each weapon has its own health. Disabled weapons rebuild for free after 12 seconds; active weapons regenerate slowly. The command core takes damage when enemies bombard the island. If it reaches zero, 25% of unspent gold is lost (rounded up), your weapons and upgrades survive, and play resumes after 8 seconds from the previous five-wave checkpoint (waves 1, 5, 10, 15…). Gold per kill rises each wave, and every cleared wave pays a bonus. The core recovers 20 health between waves.

Command stars: once you reach wave 15 you may retreat voluntarily. Retreating gives up every weapon, upgrade and coin and restarts the island at wave 1. In return you earn command stars equal to your best wave this run minus 12 (wave 15 earns 3, wave 20 earns 8). Stars buy permanent doctrine ranks, up to 10 each, where rank n costs n stars. Treasury adds 25% gold per kill, Shipyard makes weapons 8% cheaper, Field kits add 400 starting gold, Fortified core cuts core damage by 10%, and Veteran crews reload weapons 8% faster. Stars and doctrines are saved with the rest of your progress.

Progress saves automatically, including weapons, specializations, command stars and doctrines. Signed in, it syncs to your Galorum account and follows you to other devices; as a guest it stays in this browser on this device, and guest progress is not moved into an account when you sign in. A wave in progress is not saved: after a reload the current wave restarts. There are no offline earnings, and this unranked game submits no leaderboard results. Explore idle games.

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