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Lock On. Light Up. Lay Waste. Demon Protocol is a retro arcade space shooter with 25 waves of relentless enemies, 4 brutal bosses, and power-ups to keep you fighting. Choose your difficulty and see how far you can push before the demons win.
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
Lock On. Light Up. Lay Waste.
The demons are coming. Are you ready?
Demon Protocol is a fast-paced retro arcade shooter that puts you in the cockpit of humanity's last line of defense. Battle through 25 waves of increasingly deadly enemies, collect power-ups to turn the tide, and face down 4 fearsome bosses that will test everything you've got.
Features:
25 waves of intense arcade action
4 unique boss encounters
Power-up system to enhance your firepower and survivability
Multiple difficulty settings — pick your challenge
Pulsing original soundtrack
Controller and keyboard support
Classic arcade feel with modern polish
Lock On. Light Up. Lay Waste. How far can you go before Demon Protocol claims you?
Lowest tracked price: €3.15 (Jul 7, 2026) · current best: €3.15.
100% positive reviews all-time.
Right now the cheapest offer for Demon Protocol is €3.15 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 Demon Protocol is €3.15 (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 Demon Protocol 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.
