![]() ![]() On May 30, 2012, Epic Games defeated Silicon Knights' lawsuit, and won its counter-suit for $4.45 million on grounds of copyright infringement, misappropriation of trade secrets, and breach of contract On August 9, 2007, Epic Games counter-sued Silicon Knights, claiming that they were using its engine without paying royalties. UE4 licensees are permitted to post engine code snippets (up to 30 lines) in a public forum, but only for the purpose of discussing the content of the snippet.Ĭlick to expand.In 2007, Silicon Knights sued Epic Games for failure to "provide a working game engine", causing the Ontario-based game developer to "experience considerable losses." Code is copyrighted, but knowledge is free! Yes, as long as you don’t copy any of the code. Can I study and learn from the Unreal Engine code, and then utilize that knowledge in writing my own game or competing engine?. ![]() If you use any Unreal Engine code in your product (even just a little), then your entire product is governed by the EULA, and royalties are due. Can I copy and paste the Unreal Engine code into my own project or engine?.the 4.x.x version number of your installed build. You can share the source code or tools, along with any modifications you’ve made, with anyone who is an Unreal Engine licensee who is authorized to access the same version of the engine as yours, e.g. Can I share the Unreal Engine source code or tools with others?.Acceptable Non-Copyleft licenses include: Software licensed under the BSD License, MIT License, Microsoft Public License, or Apache License.Unacceptable Copyleft licenses include: Software licensed under the GNU General Public License (GPL), Lesser GPL (LGPL) (unless you are merely dynamically linking a shared library), or Creative Commons Attribution-ShareAlike License.You can extend it, modify it, fork it, or integrate it with other software or libraries, with one exception: You can’t combine the Unreal Engine code with code covered by a “Copyleft” license agreement which would directly or indirectly require the Unreal Engine to be governed by terms other than the EULA. What modifications can I make to the source code?.
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