About This Game

Build by day. Survive the skeleton siege by night.

YAARRGH! Battle Island! is a co-op pirate base-defense survival roguelite where you gather resources, build fortifications, load cannons, and defend a procedural island against escalating skeleton sieges. Play solo or with friends, strengthen your build, reinforce your base, and survive as each night grows deadlier.

Build by Day. Defend by Night.

Every run is a race against time.

By day, you scavenge the island for resources, expand your fort, and prepare your defenses.
By night, skeleton hordes attack in increasingly dangerous waves.

Survive longer, grow stronger, and hold the line as the siege escalates.

Fortify Your Island

Build a pirate stronghold that can survive the night.

• Raise walls, towers, bunkers, and choke points

• Craft weapons, armour, traps, and siege defenses

• Repair breaches and reinforce weak points before the next assault

Every structure matters when the horde arrives.

Fight the Skeleton Siege

The island becomes more dangerous every night.

• Face stronger enemies and denser waves

• Adapt to new threats and siege units

• Survive boss-level invasions that can break your defenses

If your base falls, so do you.

Procedural Islands

Each run takes place on a new island with different terrain, pressure points, and survival challenges.

• Procedural island layouts

• Randomized enemy pressure

• Variable upgrades and run pacing

• Fresh decisions every run

No two sieges play the same.

Co-op Pirate Survival

Play solo or with friends, reinforce your base, strengthen your build, and survive as each night grows deadlier.

• Share resources and divide roles

• Cover breaches and man the walls

• Coordinate builds, combat, and recovery between nights

The more the pressure rises, the more teamwork matters.

Roguelite Progression

Grow stronger from run to run with new upgrades, stronger builds, and evolving strategies.

• Randomized upgrade paths

• Unlockable abilities

• Powerful run-defining synergies

• Permanent progression between attempts

Push further with every run.

⚓ Join the Crew

YAARRGH! Battle Island! is in active development and shaped by community playtests.

Wishlist the game and request PlayTest access to help shape the island’s future.