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Buy ZERO PROTOCOL Steam Key

Q: Why is the Steam Key of ZERO PROTOCOL safer than the account format?

The Steam Key format is what we always recommend due to its ease of use and higher security compared to any other format. You just need to redeem the key in your account to download ZERO PROTOCOL to your game library. The account format requires more complicated steps and is more prone to errors during activation.

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ZERO PROTOCOL Steam Key: compare prices from 6 offers (August 2026)

A ZERO PROTOCOL Steam Key — also known as a CD Key or digital code — is the official activation code you redeem on Steam and keep in your library permanently. From €2.61 (-78%) at Kinguin, 78% below the €11.79 Steam price · 5 verified stores, 6 offers in stock · Updated 01h 21min ago.

Gift cards

Cheapest

€2.33 €2.10 -82% Save €10 vs Steam View deal

AUGGOC10

-10%

Copied!

Steam Key

Official store

€11.79 View deal

No code available

See 6 keys from €2.10

Historical prices

Medium price

Current minimum price

Zero Protocol prices: 12-month price history →

Official stores are authorized distributors, and while their prices may be higher than Key stores, their reliability is 100%.

“Choose it if you don’t mind the price difference”

Key stores are resellers and marketplaces, which is why they are usually cheaper than official stores. We only show the best ones, so you can rest assured. Plus, we offer our guarantee against any issues.

“Choose it if you’re looking for a great discount”

Editions Standard

Format Steam Key

Global EU US UK

Official stores 1 stores Hide Accounts

Resellers

No payment fees With payment fees Basic price Fees incl.

Promoted store

Difmark Digital Keys 4.1 (14.2k)

Coupon

Gocdkeys -16%

Copied!

€8.47 €7.11

Store Difmark Digital Keys

Region Global

Product type Steam Key

Edition Standard

Fees +€0.59

Kinguin
Driffle
G2A

Kinguin 4.6 (120.4k)

Subscription from 2.99€/month

€2.33 €2.10 How to get this priceHow to get

Store Kinguin

Region Europe

Product type Steam Key

Edition Standard

Fees +€0.26

Kinguin 4.6 (120.4k)

Subscription from 2.99€/month

€2.90 €2.61 How to get this priceHow to get

Store Kinguin

Region Global

Product type Steam Key

Edition Standard

Fees +€0.32

Driffle 4.4 (9.2k)

Subscription from 4.99€/month

€3.06 €2.75

Product type Steam Key

G2A 4.0 (346.2k)

€6.23 €5.11 How to get this priceHow to get

Store G2A

Region Global

Product type Steam Key

Edition Standard

Fees +€0.02

Official stores

Steam

Steam 1.8 (3.7k)

Product type Steam Key

Edition Standard

Fees -

How much does ZERO PROTOCOL for PC cost right now?

ZERO PROTOCOL for PC starts at €2.61 at Kinguin, a Steam key, which is 78% under the €11.79 it costs on the official store.

That €2.61 already includes the AUGGOC10 coupon, so apply it at checkout or the store will show you a higher price.

There is a cheaper listing, €2.10 at Kinguin, but it is a Europe key and it will not redeem on a US account however good the price looks.

Supply is thin — 6 offers from 5 stores — and thin supply keeps prices steady rather than falling.

Is it worth buying the Steam Key for ZERO PROTOCOL now or waiting?

That €2.10 key is expensive for what it usually costs.

Those €2.10 are 36% above what it usually costs, measured on the store price.
Only 5 stores sell the Steam Key, and with that little competition the price barely moves.
Across the 321 days we have tracked it, it has only been pricier than today on 23 days. The lowest it has ever cost is €1.02.

If you do not need it today, waiting pays off: we have seen it at €1.02 and right now you would pay €1.31 more. We will tell you the day it drops.

Worked out from 751 daily records of the Steam Key for ZERO PROTOCOL across 5 stores. See the full price history.

The price does not include each store's payment fees. The percentage is measured on the store price, without coupons, because that is how we record the history. The analysis only counts Key offers. Shared accounts, Steam Gift and physical editions stay out, because they are not the same product and their prices move differently.

Can you activate ZERO PROTOCOL in US?

5 of the 6 offers work on US — the Global ones plus the ones issued for your own region.

Information about ZERO PROTOCOL for PC

Enter the enigmatic world of the IAS Antarctic Research Complex, where your survival becomes a constant struggle in this first-person sci-fi thriller. Face challenges that require wits and skill: you'll need to select passwords to access doors, search for keycards for terminals, repair broken devices, and combine items. This game won't make things easy for you, so be prepared to think critically.

Even though you have a gun, the feeling of safety is short-lived. The enemies lurking in this environment are lethal, and not all of them can be eliminated. The graphics evoke the aesthetics of classic 3D titles such as Zero Tolerance, System Shock, and Half-Life, creating a dense and oppressive environment that reinforces the sense of danger. Carefully crafted sound effects add an extra layer of tension to the experience.

The balance between clarity and madness is key in this game. Every decision you make, whether conscious or impulsive, will have repercussions that will lead you down different paths. As you explore, you'll need to keep an eye out for details and clues that can help you unravel the complex's secrets.

With each step, the player will be forced to adapt and react to a hostile environment. Combining elements and strategically using resources will be essential to progressing through the story. Immersion in this eerie world feels palpable, making every action count in your search for answers.

Most common FAQs when buying ZERO PROTOCOL for PC in digital format:

It is a key that will allow you to download the game ZERO PROTOCOL on your PC from official download platforms.

As of 23/08/2026, in United States, the best price we have found in our selection of online stores that include the key for ZERO PROTOCOL on PC is €2.10.

The Steam Key format is what we always recommend due to its ease of use and higher security compared to any other format. You just need to redeem the key in your account to download ZERO PROTOCOL to your game library. The account format requires more complicated steps and is more prone to errors during activation.

The only issue we’ve encountered in 13 years is receiving a duplicate key that doesn’t work. In that case, simply contact the store where you bought ZERO PROTOCOL, and they will provide a new key. You can also contact us, and we’ll help you out.

Delivery times vary by store. For example, in the case of Instatgaming, Eneba, G2a, or Kinguin, delivery is usually instant or takes just a few minutes. These stores rarely delay game deliveries.

Other stores may take 30–40 minutes depending on game availability. On release days, delivery times may be slightly longer.

If you notice an unusually long delay, contact the store or us, and we’ll resolve it as quickly as possible.

At Gocdkeys, we only list the most well-known stores that have passed our quality checks. One of the most important factors is good customer support, and all listed stores offer it.

There have been occasions when those services were overwhelmed, which is why we also offer 24/7 customer support to help resolve any issues or questions.

In any case, we always offer a 100% guarantee, so you won’t have any problems, and if you do, we’ll resolve them as soon as possible.

Need more help? Use our FAQs.

Gocdkeys - Transparency and credibility

At GOCDKEYS we display real prices from 49 verified stores. Some links may be affiliate links, which help us keep the service running at no extra cost to users. Prices and conditions are always exactly the same as those offered by the store. All stores go through our own store verification methodology, so you can buy with complete confidence.

If you have doubts before buying, we explain why CD keys are legal and break down the most common myths and facts about digital games, so you can make your decision with clear and up-to-date information.

More than 4.5M users in 14 years have trusted us to find the best deals — Trustpilot 4.1/5 ★
We compare 49 verified stores where we find the best deals for gamers
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We track prices every 2 hours and sort by final cost - Last update: 2026-08-23 08:07:49