Orbital Defense 2899

Build defenses, reshape your research, and protect orbital colonies in a pixel-art sci-fi tower defense game. Even a failed defense earns research points toward your next attempt. Space Year 2899. You are the new Operations Chief of Japan’s Space Facility Defense Office. Debris storms, the mysterious Veil lifeforms, and unmarked drone fleets threaten ten colonies. Your job is to hold the line. READ THE ROUTES Every sector changes the problem: paths that double back, spirals winding inward, and several lanes merging into one. Place defenses where their range counts. Use special pads to boost damage or reach a second route, all within a limited budget. COMBINE SIX DEFENSE TYPES Cannons, missiles, lasers, sensors, shields, and electronic warfare each have a role. Adapt to armored, shielded, and stealth enemies. Develop two final upgrades for each defense type, then choose the one that fits your plan. RETHINK YOUR RESEARCH Explore 130+ research projects across a connected technology web. Combine burning, corrosion, chain explosions, critical hits, and more. Earn research points for the waves you reach, even when the colony falls. Refund research at no cost and save up to three loadouts to try a different approach. CHOOSE YOUR CHIEF Play as Shingo Asamura or Mizuki Saegusa, two chiefs with different traits and their own voices in the story. Lead ten defense operations through to the ending, with sector-specific rules including electromagnetic storms and evacuation escorts. KEEP TESTING YOUR TACTICS Take on Special Orders, research-budget challenges, and New Game+ after the campaign. Carry your research forward and face stronger enemies that adapt to the defenses you rely on most. The next defense starts with a better plan.