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Save humanity! Help Jack Big Chin defeat the alien invaders, in a hard action-adventure game with 3D platform elements, where you must improve your weapons and activate cannons to complete your missions.
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$1.69 (Jul 7, 2026) · current best: CA$3.39.
100% positive reviews all-time.
Right now the cheapest offer for Jack Big Chin: Alien Invasion is CA$3.39 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 Jack Big Chin: Alien Invasion is CA$1.69 (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 Jack Big Chin: Alien Invasion 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.
