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Defend humanity in this retro-inspired space shooter as you patrol the stars and blast killer asteroids from the sky. Keep power to the energy pylons while maintaining the defense shield protecting Earth to earn powerful upgrades for your ship. Do you have what it takes to protect our world?
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 Social Deduction Fest ends
In Asteroid Defender! you take on the role of an elite pilot who has been recruited to the Earth Defense Force. Your mission: protect our world. Patrol the stars with the X-33 fighter ship as you blast endless waves of asteroids from the sky before they can hit Earth in this fast paced space shooter. Earn upgrades along the way, maintain your defenses, and undertake various side missions. Do you have what it takes to protect our world?
Powered by four separate pylons, the Earth shield provides a secondary layer of defense for any asteroids that slip past your guard. You must seek out and collect power cells during your patrol of the stars. As you travel between each pylon, keep a close watch over the power levels, making sure to install power cells into any failing pylon.
If all four pylons fail then the Earth defense shield will power down. Without the shield Earth can only survive several asteroid impacts before it is destroyed!
Right now the cheapest offer for Asteroid Defender! is CA$6.49 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 Asteroid Defender! is CA$6.49 (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 Asteroid 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.
