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Equip yourself with essential knowledge and expert advice with the digital guidebook.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
How it worksTracked since Jul 7, 2026.
Steam Social Deduction Fest ends
Official stores with direct support.
This is the base game required to play this DLC. Other expansions may also be required.
Right now the cheapest offer for Serum - Official Guide is CA$3.49 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 Serum - Official Guide is CA$3.49 (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 Serum - Official Guide 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.
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