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Steam is the uncontroverted market leader in digital PC game distribution, according to a 2025 federal court order, but that does not establish that Valve is an illegal monopolist. The legal question is whether Valve has durable market power in a properly defined market and used exclusionary conduct to acquire or maintain it. The US and UK proceedings discussed below have advanced procedurally; neither cited decision is a final ruling that Valve violated antitrust law.
What does “monopoly” mean in antitrust law?
In everyday speech, “monopoly” can mean a company that dominates a market. In US antitrust law, market leadership by itself is not enough to establish unlawful monopolization. The Federal Trade Commission describes the inquiry as whether a firm has significant, durable market power—the long-term ability to raise prices or exclude competitors—and whether it obtained or maintained that power through exclusionary or predatory conduct. The FTC also says that succeeding through superior products, innovation, or business skill is legal. FTC guidance on monopolization
That distinction matters for Steam. A large user base, a prominent storefront, or a substantial market-share estimate can be relevant evidence, but none answers on its own whether Valve’s conduct is unlawful. Courts must assess the market and conduct at issue, along with their effects and any business justifications.
Why does the definition of the market matter?
A market-share figure means little without knowing what products, services, customers, and geography are included. “PC game distribution” could mean digital PC storefronts, all ways of obtaining PC games, or a narrower service such as processing in-game payments. The complaints in these cases propose market definitions; those are plaintiffs’ positions, not settled findings.
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- For players: The relevant alternatives might be other PC storefronts or a broader set of ways to get and play PC games.
- For publishers: The question may be whether they can reach customers through rival storefronts or other distribution channels without losing meaningful access to buyers.
- For in-game purchases: A narrower market could focus on payment processing within PC games, rather than storefront distribution generally.
These are different competitive questions. An estimate for desktop-game distribution cannot automatically establish Valve’s share of a separate payment-processing market. Nor does a share in one geographic or product market necessarily describe competition in another.
What do the cited market-share figures actually show?
The two figures below come from legal pleadings, not a verified, independent market-share dataset. They describe different estimates, years, and market formulations, so they should not be treated as interchangeable or as a current measurement.
| Figure | What the source says | How to read it |
|---|---|---|
| At least 75% | The plaintiffs’ August 2024 consumer class complaint alleges this share for its defined PC game distribution market. Elliott et al. v. Valve complaint | An allegation in a complaint, not a court-established or independently verified share. |
| 74% | A February 2026 New York Attorney General complaint attributes this estimate for 2024 PC desktop game distribution to industry analysts. New York v. Valve complaint | An estimate reported in a pleading; the complaint passage does not identify the analysts’ methodology. It is not a verified current share. |
The figures support the point that Steam is alleged to hold a leading position, but they do not independently resolve how large the relevant market is, whether Valve can sustain market power over time, or whether its conduct violates antitrust law.
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What conduct do plaintiffs challenge?
The claims focus on alleged rules and fees that, plaintiffs argue, can constrain competition between storefronts or payment channels. These are disputed allegations, not findings that the rules had the claimed effects.
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Price-parity obligations
In the US and UK proceedings, plaintiffs challenge alleged price-parity obligations: rules they say limit a publisher’s ability to offer a lower price through another store or channel. Their theory is that such restrictions can reduce price competition between storefronts. Whether the rules have that effect, and whether Valve has a justification for them, remains a matter for the merits rather than something established by the procedural decisions described below.
Commissions on games sold through Steam
The New York Attorney General’s February 2026 complaint says Valve generally charges a 30% commission on third-party games sold through Steam. That is a statement in the complaint, not an independently verified universal fee for every transaction. A commission rate alone does not establish unlawful monopolization; the legal analysis would also need to address the market, the effect of the challenged conduct, and relevant justifications. New York Attorney General complaint
In-game payment processing
The 2024 Elliott complaint alleges a separate market for PC in-game payment processing and says Valve’s requirements restrict alternative payment processing. That is a distinct theory from storefront distribution: the relevant issue would be competition among ways to process in-game transactions, not just where a player buys a game. The allegation has not been established as a court finding. Elliott et al. v. Valve complaint
What have the US and UK proceedings decided?
The decisions cited here concern whether claims may proceed collectively, not whether Valve has been found liable for monopolization.
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On June 27, 2025, the US District Court for the Western District of Washington granted the plaintiffs’ motion for class certification in In re Valve Antitrust Litigation. The order calls Valve “the uncontroverted market leader in digital PC game distribution.” Class certification determines whether a case can proceed on behalf of a group under the applicable procedural requirements; it is not a final decision that Valve violated antitrust law. June 27, 2025 order
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- Valve is entering the gaming console marketplace with the new Steam Deck, a console geared towards PC gamers. The Steam Deck can be docked to a monitor, and used as a PC, or docked to a TV.
- Players can play a huge variety of games at any time with the comfort of a console and the freedom of a PC. Not anti-glare screen.
- Like the name suggests, the Steam Deck will include upgraded 1TB storage, and will include a carrying case. A micro SD slot will also enable expanded storage.
- Valve partnered with AMD to create a specialized APU optimized for handheld gaming, and Valve says the chip will deliver performance to run AAA gaming titles.
- The Steam Deck is outfitted with a 7-inch touchscreen, and two trackpads under the control sticks that allow gamers to operate games never designed outside of mouse and keyboard capabilities.
UK proceedings: collective-proceedings application
In Vicki Shotbolt Class Representative Limited v Valve Corporation, the Competition Appeal Tribunal’s 2026 judgment, [2026] CAT 4, considered an application for a collective proceedings order. The tribunal concluded that the authorisation condition was met and that it was just and reasonable for the proposed representative to act. It discussed methodological issues involving Steam Keys, calculating the effective commission, and estimating the effects of alleged price-parity obligations. The judgment addresses whether the proposed collective claim may proceed; it is not a final finding of infringement. Competition Appeal Tribunal judgment
New York complaint: a different set of allegations
The New York Attorney General filed a complaint on February 25, 2026. It includes the attributed 74% estimate and alleges that Valve generally charges a 30% commission on third-party games. The complaint also concerns New York gambling-law allegations about game features. Those allegations should not be conflated with a judicial finding that Valve has monopoly power or unlawfully monopolized a market. New York Attorney General complaint
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What evidence would settle the debate?
A merits decision would require more than a prominent storefront or a headline share estimate. The central questions are:
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- Is market power significant and durable? Evidence would need to show whether players and publishers have meaningful alternatives and whether rival services can constrain Valve over time.
- What do the challenged rules do in practice? The effects on prices, publisher choices, payment options, output, and consumer choice would matter, as would the evidence supporting each side’s account.
- What justifications apply? Steam’s scale, discovery features, community tools, distribution infrastructure, or service quality may be relevant to explaining its popularity or to assessing a business justification. Their relevance and weight are issues to evaluate, not conclusions established by the procedural rulings.
The US federal case, the UK collective proceedings, and New York’s state action arise under different laws and procedural tests. Their allegations and decisions therefore should not be combined into a single verdict.
So, is Steam a monopoly?
Steam is described as the uncontroverted market leader in the cited 2025 US court order, and complaints cite large market-share estimates. But the 75% figure is an allegation, while the 74% figure is an estimate attributed to unnamed industry analysts in a 2026 complaint for 2024. Neither is a court-established current share, and neither by itself proves unlawful monopolization. The cited US and UK decisions allow collective claims to proceed; they do not resolve the antitrust merits. The careful answer is that Steam’s market power and Valve’s challenged conduct are the subject of litigation, not that a court has already declared Valve an illegal monopolist.
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