Orbital Bastion Defense
Build up an orbital bastion, survive enemy waves, upgrade your core, and spend tactical power-ups when the colony is under pressure.
Orbital Bastion Defense is a space idle defense game built around a central orbital station. Enemy asteroids, scout drones, raiders, carriers, and boss dreadnoughts spiral toward your base. The bastion fires automatically, but long-term survival depends on when you start waves, when you upgrade the core, and when you spend your limited power-ups. Credits keep accumulating between sessions, so returning players can push deeper into harder waves.
How to Play Orbital Bastion Defense
Tap the game area or press Space to start a wave. Enemies approach the orbital station from deep space. Your bastion automatically fires lasers, and upgraded cores can launch missiles for extra burst damage.
Destroyed enemies give credits and score. Spend credits on the Upgrade button to improve fire rate, damage, hull capacity, and missile support. The game also stores offline credits while you are away.
Power-ups
- Shield: reduces incoming hull damage for a short time.
- EMP: slows all active enemies and gives you time to recover.
- Strike: hits every enemy on screen with heavy area damage.
- Repair: restores hull before the station falls.
Progression
Every fifth wave brings a tougher boss. Clear waves to gain credits, unlock stronger core levels, earn diamond rewards on milestone waves, and climb the leaderboard.
