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一款悬疑解谜的探案游戏，您将扮演负责案件的警探Chen，在犯罪现场搜索物证，利用关联系统层层推理，直到找到案件的真相。当然游戏中还有层层机关需要破解。真相只有一个，速来破案。
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
Official stores with direct support.
Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →
Right now the cheapest offer for Below the Surface:Assassin's Prison is CA$1.29 at Steam. KingsPrice compares 2 offers from 2 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Below the Surface:Assassin's Prison is CA$0.64 (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.
Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →
Create a free price alert on this page and KingsPrice will email you when Below the Surface:Assassin's Prison 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.
