《道格拉斯警督的日记》 — cheap CD keys, compare prices
Is it worth buying?
- The price is at or near its all-time low — a good time to buy.
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
《道格拉斯警督的日记》 is a detective game in which you play a middle-aged inspector hunting a terrifying serial killer in an isolated village. If you uncover the killer's motives, you as the player may decide whether to cooperate with them toward their goal. The game was developed by 日食网络 solar eclipse studio.
Best price today
€0.99
all-time low: official €0.99 near low
The cheapest 《道格拉斯警督的日记》 key right now costs €0.99 at Steam. The lowest price we have recorded for this game: €0.99.
The average low over the past 5 months was €0.99.
Prices as of
Steam best price Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
Lowest — official stores
€0.99
Jul 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €0.99 | — |
| Sept 2026 | €0.99 | — |
| Aug 2026 | €0.99 | — |
| Jul 2026 | €0.99 | — |
| Jun 2026 | €0.99 | — |
Lowest in-stock price per month from our price history; the current month is the low so far.
How to activate your key
- Steam key — open the Steam client → Games → Activate a Product on Steam → enter the key. Stores with this activation: Steam
Price alert Catch alert Price alert
Confirm in our Telegram bot — no account, no spam.
All-time low so far: €0.99
System requirements
| Minimum | |
|---|---|
| OS | Windows 7/8/10 (64-bit) |
| Processor | 1.8 GHz |
| Memory | 200 MB RAM |
| Graphics | 1060 |
| Storage | 268 MB available space |
Similar games
About this game — FAQ
Can 《道格拉斯警督的日记》 be played single-player?
Yes, 《道格拉斯警督的日记》 is a single-player game.
What languages does 《道格拉斯警督的日记》 support?
《道格拉斯警督的日记》 is available in: English, Simplified Chinese, Traditional Chinese.
FAQ
Where is the cheapest place to buy a 《道格拉斯警督的日记》 key?
The cheapest 《道格拉斯警督的日记》 key is currently sold by Steam for €0.99. The lowest price we have ever recorded for this game: €0.99.
How much does 《道格拉斯警督的日记》 cost?
《道格拉斯警督的日记》 currently costs from €0.99 — the cheapest offer across the stores we track.
Is Steam an official store or a keyshop?
Steam is an official store — keys come directly from the publisher or an authorized distributor.
Are keys from these stores legal?
Buying is legal — keys come from the grey market, so a small deactivation risk exists. So before paying, check the seller's buyer protection.
Which key region should I pick?
Global activates everywhere. Regional keys (Europe, North America, RU-CIS) only work on accounts from that region — use the Region filter to match your account.
What is an activation platform?
The service where the key activates — Steam, GOG, Epic or the publisher's platform. A key for one platform won't work on another, hence the separate filter.
What's the difference between editions?
Standard is the base game; Deluxe usually adds an expansion or bonus content. The edition filter shows exactly that variant, with no mixed prices.