WoW private servers: what is allowed, and where are the limits?

01 / CONTEXT

One label, several legal questions

“Private server” is used for very different projects. Independently written server software, a bundle of third-party game files and a publicly advertised realm are different things. A meaningful assessment identifies the code and content involved and the acts actually performed.[2][6][10][11]

Roles matter too: players use a client, developers write or study software, and operators provide a service. One person may fill several roles. Permission for one act does not automatically settle every other question.[4][5][6]

02 / CONTEXT

What open source actually permits

The vMaNGOS core uses GPL v2 with an OpenSSL exception. It permits use, modification and distribution subject to conditions, including notices and source-code obligations when distributing.[1]

Commercial use is not categorically prohibited; private changes need not automatically be published. Running and distributing are different acts. Additional components may use different licences.[1]

A server-code licence grants no additional rights to Blizzard’s client, artwork, music or other third-party content. A public repository is also not evidence that every included or added file has undergone legal review.[2][10]

03 / CONTEXT

Reverse engineering is not categorically prohibited

Software copyright protects a program’s expression. Underlying ideas and principles, including interface principles, are excluded from that protection. In SAS Institute, the CJEU distinguished a program’s functionality from its protected expression. This is not a general permission to copy code or other works.[2][3]

Section 69d(3) UrhG allows an entitled user to observe, study or test a program through acts of use they are authorised to perform. This is distinct from decompilation.[4]

Decompilation for interoperability of an independently created program has additional conditions under section 69e: the information must be necessary and not readily available, and the examination must be limited to necessary program parts. Subsequent use and disclosure of the information are restricted too.[5][16]

“Created through reverse engineering” describes a method, not legal certification of an entire project. This article does not claim to audit the complete development history of vMaNGOS or any other emulator.[5][3]

04 / CONTEXT

What a purchased original disc changes

Lawful acquisition of a client can be important to the right to use it. It does not transfer every copyright. Installation, loading, modifications and the particular use still need permission or an applicable statutory exception.[6][4]

A permitted backup is different from offering downloads to others. Likewise, the ability to resell a lawfully marketed program copy does not automatically settle the operation of a separate online service.[4][6][11]

“I own the original disc” is relevant, but does not by itself establish legal clearance for every client-and-server setup.[6][4]

05 / CONTEXT

Separate contractual terms, copyright and criminal liability

Blizzard’s published EULA prohibits, among other things, unauthorised connections to emulating servers and certain matchmaking or protocol-emulation activities. These are contractual restrictions. Breaching a contractual clause is not, by that fact alone, a criminal offence.[7][15]

For a particular client, the regional and historical terms validly agreed matter. Today’s published EULA does not automatically answer that question for every old installation. Standard contractual terms are also subject to statutory limits.[9][8]

Section 69g(2) invalidates terms that conflict with the mandatory exceptions it identifies, including study under section 69d(3) and decompilation under section 69e. This does not invalidate every other restriction on use.[8]

06 / CONTEXT

Private tests and public services

The following examples are editorial guidance. They show which questions arise, rather than clearing or condemning a particular service.

Situation	The key distinction
Testing server code locally	A test using appropriately licensed code and your own test data initially concerns that code’s licence. Adding third-party client files requires separate consideration.[1][4]
Playing alone with an original client	A small audience does not replace examination of client rights, modifications and valid terms. Ownership and the particular use are separate issues.[6][4][8]
Opening a free public realm	Besides the server code, transmitted or publicly available content and contractual issues matter. Free access is not a general copyright exception.[6][11][10]
Offering a downloadable client package	Sharing protected files needs its own legal basis. The possibility that some recipients own a disc does not supply it.[11][6]
Running a realm with a shop or payments	Payments do not resolve the rights question. Commercial presentation and trademark use can create additional issues.[13][10]

07 / CONTEXT

Game files and client modifications have their own limits

A server core, database, extracted client data, maps, models and music do not share one blanket licence. Their treatment depends on the particular content. A core’s GPL cannot simply be applied to every added file.[10][2][11]

A patch can itself contain protected code or content. Whether a particular modification is permitted depends on what it actually changes and the relevant rights. Technical protection mechanisms raise additional questions; section 69f specifically addresses tools for unlawful circumvention of program protection.[6][4][12]

08 / CONTEXT

Free access, donations and commercial operation

“No profit” is not blanket permission to reproduce protected works or make them publicly available. Conversely, earning money does not by itself prohibit use of GPL-licensed code. Both the software licence and rights in game content need to be addressed.[10][11][1]

Commercial services also need to consider trademark rights. Presenting an offering as official or Blizzard-approved can raise additional issues. A fan-project disclaimer does not grant a licence for otherwise unauthorised acts.[13]

09 / CONTEXT

Different kinds of consequences

Contractual consequences, civil claims and possible criminal liability are separate matters. Section 97 UrhG provides for injunctions and, where fault is established, damages. Criminal liability requires the elements of a relevant offence; section 106 addresses certain unauthorised exploitation acts. Not every legal issue satisfies those conditions.[14][15]

Assessing a specific project therefore requires its actual versions, licences, files, modifications and intended audience. For a planned public launch, legal advice addressing those facts is more useful than a blanket claim that all private servers are lawful or unlawful.

10 / CONTEXT

Documented cases from Germany, the EU and the US

These examples show different forms of enforcement. A court ruling, a consent judgment and a shutdown following a legal notice are not equivalent. US decisions are included as historical cases, not binding rulings on German or EU law.

Germany and the EU: proceedings and outcomes

The German Blizzard proceedings below concern bots and client use, not a court-ordered shutdown of a WoW private server. The additional CJEU case concerns other companies. Nostalrius has a French connection, but our evidence remains an operator statement rather than a French judgment.

These entries describe the outcome of each identified decision. A remittal does not establish a subsequent final resolution or a specific payment.

Specific WoW private-server judgments in Germany or the EU?

Research checked 8 November 2026: for this article, searches of publicly available German-, English-, French-, Spanish- and Italian-language sources did not establish such a judgment with a verifiable court, case number and outcome. This is a limited research finding, not proof that no such decision exists.

The BGH bot cases are not substitutes for a private-server case. Our Nostalrius source records a legal notice, not a French judgment. Turtle WoW and Scapegaming are US proceedings; European participants or hosting do not make them EU judgments. Lack of a verified case is not legal clearance.

2016Germany · bot development, not a private server

BGH: World of Warcraft I

Action: Blizzard’s European distributor challenged commercial client copying for the development of WoW and Diablo III bots.
Outcome: On 6 October 2016, the BGH largely upheld the injunction, disclosure and declaratory damages claims. It removed only the standalone act of displaying the game on screen from the prohibition (I ZR 25/15).
Context: Program study can be permitted despite private-use licence purposes. Here, however, the software exception did not cover the copied audiovisual content. This was no blanket ban on reverse engineering; later enforcement is addressed separately below.

Primary source[21]

2017Germany · distribution of Buddy bots

BGH: World of Warcraft II

Action: Blizzard sought, among other relief, to stop the distribution of Buddy bots on unfair-competition grounds.
Outcome: On 12 January 2017, the distribution ban stood. The BGH partly set aside and remitted trademark-related information and declaratory damages claims concerning other EU countries (I ZR 253/14).
Context: This was not a complete win on every issue or a ruling on server emulation. Those ancillary claims must be distinguished from an award of a specific payment.

Primary source[22]

2022Germany · follow-up to the bot litigation

BVerfG: limits of enforcement

Action: Following the injunction arising from World of Warcraft I, an enforcement penalty was imposed; the affected person brought a constitutional complaint.
Outcome: On 13 April 2022, the Federal Constitutional Court set aside the challenged appellate order for violating the prohibition of arbitrariness and remitted the case (1 BvR 1021/17).
Context: This succeeded against the particular enforcement order. It did not set aside the original injunction or generally authorise bots or private servers.

Primary source[23]

2012EU comparison case · Blizzard not involved

CJEU: SAS Institute / WPL

Action: SAS challenged WPL’s development of a program with similar functions using licensed software.
Outcome: On 2 May 2012, the CJEU held that functionality is not protected expression of a computer program. Study through authorised acts of use can be permissible (C-406/10).
Context: This was a preliminary ruling interpreting EU law, not clearance of a WoW server. Rights in copied code and other protected content remain separate questions.

Primary source[3]

Other international cases

2005US appeal ruling · Battle.net, not WoW

bnetd / Davidson & Associates v. Jung

Action: Blizzard and Vivendi sued developers of the Battle.net emulator over contract breaches and US DMCA violations.
Outcome: On 1 September 2005, the Eighth Circuit affirmed the ruling for Blizzard and Vivendi. Contract terms and circumvention of access controls were central issues.
Context: This concerned games including StarCraft and Diablo, not a WoW realm. The US analysis must be separated from the EU exceptions explained above.

Primary source[17]

2010US default judgment · WoW private server

Scapegaming

Action: Blizzard sued Scapegaming’s operator and sought a default judgment.
Outcome: On 10 August 2010, the California federal district court awarded Blizzard a total of US$88,594,539, plus post-judgment interest.
Context: This was a civil monetary judgment, not a criminal fine. It was entered by default; the amount proves neither actual collection nor a standard penalty for individual players.

Primary source[18]

2016Legal notice and announced shutdown

Nostalrius

Action: According to its own announcement, the team received notice from US and French lawyers acting for Blizzard, threatening proceedings against the team and host OVH.
Outcome: The team then announced that its realms would close on 10 April 2016.
Context: The linked primary source is the operators’ statement. It is not a court judgment and does not establish a court-awarded monetary sum.

Primary source[19]

2026US consent judgment · April 2026

Turtle WoW / AFKCraft Ltd.

Action: In Blizzard v. Turtle WoW et al., a consent judgment and permanent injunction were entered against AFKCraft Ltd. (Document 59).
Outcome: The order prohibits activities including operating or developing the relevant servers and modified clients, soliciting related payments, and transfers facilitating a successor project.
Context: The order rests on the parties’ agreement and binds its specified addressees. It is not a universal ruling against every emulator and states no publicly quantified settlement payment.

Primary source[20]

These cases show both out-of-court and judicial enforcement. Their relevance elsewhere depends on jurisdiction, files, conduct and contracts. Applying the US outcomes wholesale to Germany would be misleading.

11 / CONTEXT

Four common shortcuts

Is every emulator automatically unlawful?

No. Functional reimplementation and protected expression are distinct. The actual components and acts matter.[2][3]

Does open source clear everything?

No. A licence covers the work licensed under it; rights in third-party content remain a separate question.[1][10]

Does an original disc make every private server lawful?

No. Lawful acquisition, permitted client use and server operation are different questions.[6][4]

Is an EULA breach automatically criminal?

No. Contract terms and the statutory elements of a criminal offence require separate assessment.[15][8]

PRIMARY SOURCES / 08 NOV 2026

Sources and scope

Sources are the statutes and decisions listed below, vMaNGOS’s licence, Blizzard’s terms and the labelled Nostalrius operator statement. Statutory rules, contractual restrictions and our examples are distinguished throughout. This article does not assess any specific project or replace advice on particular facts.

UrhG is Germany’s Copyright Act. German statutory wording is authoritative; English explanations here are editorial translations. EUR-Lex offers official EU-language versions. Blizzard terms must be matched to the relevant regional contract. The linked US PDFs contain the original decisions; two are document copies hosted by Justia.