Boss Key — 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
Boss Key is an upcoming toolkit built for solo creators who want to design their own collectible card game without writing any code. It offers a visual editor, ready-made templates, and live previews, letting users test and publish their creation directly from the app. The title is heading into early access, developed and published by the Institute of Card Game Studies, and is planned for a 2026 release.
Best price today
€7.64
lowest in tracked period: official €7.64 near low
The cheapest Boss Key key right now costs €7.64 at Steam. The lowest price we have recorded for this game: €7.64.
The average low over the past 3 months was €7.92.
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
€7.64
Aug 2026
Price history
last 51 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €7.64 | — |
| Sept 2026 | €8.49 | — |
| Aug 2026 | €7.64 | — |
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
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All-time low so far: €7.64
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 10 / 11 (64-bit) | Windows 10 / 11 (64-bit) |
| Processor | Intel Core i3-4130 or AMD FX-4350 | Intel Core i5-7500 or AMD Ryzen 3 1200 |
| Memory | 8 GB RAM | 16 GB RAM |
| Graphics | Intel HD Graphics 4600, NVIDIA GeForce 710, AMD Radeon R5 230 (OpenGL 3.2 Support) | NVIDIA GeForce GTX 650 Ti, AMD Radeon HD 7850 or better |
| DirectX | Version 11 | Version 11 |
| Storage | 8 GB available space | 16 GB available space |
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About this game — FAQ
Does Boss Key have co-op?
Yes, Boss Key supports online and local (split-screen) co-op.
Does Boss Key have multiplayer?
Yes, Boss Key has multiplayer. It supports PvP.
Can Boss Key be played single-player?
Yes, besides multiplayer modes, Boss Key can also be played solo (single-player).
What languages does Boss Key support?
Boss Key is available in: Simplified Chinese, English.
Can Boss Key be played co-op via Remote Play Together?
Yes — Steam Remote Play Together lets you invite friends to play local modes online without them owning the game.
Does Boss Key use Steam Cloud saves?
Yes, Boss Key uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a Boss Key key?
The cheapest Boss Key key is currently sold by Steam for €7.64. The lowest price we have ever recorded for this game: €7.64.
How much does Boss Key cost?
Boss Key currently costs from €7.64 — 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.