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In the fascinating quiz “I Know Everything” you can play against a computer player or a friend. You can test your erudition and will probably learn many interesting things from various fields, including mathematics, literature, cuisine, and astronomy.
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 ends
Lowest tracked price: €0.79 (Jul 7, 2026) · current best: €3.99.
79% positive reviews all-time.
Right now the cheapest offer for I Know Everything is €3.99 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 I Know Everything is €0.79 (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 I Know Everything 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.
