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Defend Zytherion in frantic battles against alien hordes! In Astro Defender, pilot the legendary Zenith-01 and face a galactic threat in a fast-paced action-platformer. Will you be the galaxy's last hope?
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
Get ready to embark on a breathtaking intergalactic battle! In Astro Defender, you take control of Astro, a fearless alien hero piloting the legendary Zenith-01 to protect the peaceful planet Zytherion from a massive invasion led by the ruthless Lord Kael'Thar.
Combining the thrill of classic arcades with modern action-platformer mechanics, Astro Defender delivers frantic gameplay, strategic challenges, and an engaging story. Traverse shimmering forests, electrified deserts, and floating cities while facing hordes of biomechanical enemies.
Arcade Rhythm: Face waves of enemies in fast-paced, intense battles.
Vibrant Environments: Explore alien landscapes filled with intricate details and dangers.
Be the last hope of Zytherion and defend the galaxy's future. Will your courage be enough to face the chaos? Astro Defender launches first on Steam, ready to test your skills and reflexes!
Right now the cheapest offer for Astro Defender is CA$3.89 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Astro Defender is CA$3.89 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when Astro Defender drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
