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You and your space troop have a tough mission to defend Earth from an alien invasion in this epic space war. Will you be able to guide your troops to victory?
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
Lowest tracked price: CA$1.19 (Jul 7, 2026) · current best: CA$1.19.
0% positive reviews all-time.
Right now the cheapest offer for Space Defense is CA$1.19 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 Space Defense is CA$1.19 (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 Space Defense 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.
