The Case Book of Arne — cheap CD keys, compare prices
Is it worth buying?
Reviews are solid (Steam 88%) · The price is at or near the lowest we've tracked — a good time to buy
Buy · Steam €4.50
About the game
The Case Book of Arne centers on a vampire and a girl hiding a shared secret while investigating an unusual case in a world touched by the paranormal. Taking on the role of the investigator, the player works to solve a mystery where the prime suspect turns out not to be human, blending RPG and detective-adventure elements. It was developed by Vaka Game Magazine and HARUMURASAKI and published by Vaka Game Magazine in 2020.
Best price today
€4.50
· · check “Region” on the seller’s page
Steam · Official store · Steam
Global key · check “Region” on the seller’s page
You pay Steam directly · same price as on their site
Notify me when it drops below €4.05
- On Steam
- €4.50
- all-time low
- €4.5029 Oct
- Average low, 4 mo.
- €5.27
The cheapest The Case Book of Arne key right now costs €4.50 at Steam — the best of 2 compared offers. (Prices as of )
Offers 2 · PC · from €4.50
Prices as of
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
The Case Book of Arne prices by store 2
| Store | Type | Price |
|---|---|---|
| Steam | Official store | €4.50 |
| Kinguin | Marketplace | €6.74 |
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Lowest official since we started tracking (Aug 2026)
€4.50
Oct 2026
Lowest — keyshops
€6.74
Aug 2026
Monthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €4.50 | €6.74 |
| Sept 2026 | €8.19 | €6.74 |
| Aug 2026 | €4.91 | €6.74 |
| Jul 2026 | €4.91 | €7.19 |
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, Kinguin
System requirements
| Minimum | |
|---|---|
| OS | Windows 10 |
| Processor | Intel Core2 Duo or higher |
| Memory | 2 GB RAM |
| Graphics | Open GL compliant video card |
| Storage | 1 GB available space |
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About this game — FAQ
Can The Case Book of Arne be played single-player?
Yes, The Case Book of Arne is a single-player game.
What languages does The Case Book of Arne support?
The Case Book of Arne is available in: English, Japanese, Simplified Chinese.
FAQ
Where is the cheapest place to buy a The Case Book of Arne key?
The cheapest The Case Book of Arne key is currently sold by Steam for €4.50. That is the best of 2 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €4.50.
How much does The Case Book of Arne cost?
The Case Book of Arne currently costs from €4.50 — 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.