Knockout Battle — cheap CD keys, compare prices
Is it worth buying?
- The price is above its low (was €2.99), but within a reasonable range. Notify me on a drop →
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
Knockout Battle is a chaotic multiplayer party game about shattering your friends into countless fragments and sending them flying off-planet. Players drink potions that make them huge, lightning-quick, or incredibly strong, and can wield everything from firearms to a mythical hammer to a world-ending nuke. Alvin L. Dobric and Anton Ploetner developed the game, vionical published it, and it came out in 2026.
Best price today
€3.36
all-time low: official €2.99 (+12%)
The cheapest Knockout Battle key right now costs €3.36 at Steam. The lowest price we have recorded for this game: €2.99.
The average low over the past 3 months was €3.24.
Prices as of
Steam best price Official store
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Listed seller price shown — payment fees may vary by method.
Lowest — official stores
€2.99
Aug 2026
Price history
last 66 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €3.36 | — |
| Sept 2026 | €3.36 | — |
| Aug 2026 | €2.99 | — |
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
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All-time low so far: €2.99
System requirements
| Minimum | |
|---|---|
| OS | Windows 10,11 |
| Processor | 2.5 |
| Memory | 2 GB RAM |
| DirectX | Version 9.0 |
| Storage | 1 GB available space |
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About this game — FAQ
Does Knockout Battle have co-op?
Yes, Knockout Battle supports online and local (split-screen) co-op.
Does Knockout Battle have multiplayer?
Yes, Knockout Battle has multiplayer. It supports PvP.
Can Knockout Battle be played single-player?
Yes, besides multiplayer modes, Knockout Battle can also be played solo (single-player).
Does Knockout Battle support a controller/gamepad?
Yes, Knockout Battle has full controller support.
What languages does Knockout Battle support?
Knockout Battle is available in: English.
Can Knockout Battle 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.
FAQ
Where is the cheapest place to buy a Knockout Battle key?
The cheapest Knockout Battle key is currently sold by Steam for €3.36. The lowest price we have ever recorded for this game: €2.99.
How much does Knockout Battle cost?
Knockout Battle currently costs from €3.36 — 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.