How do I open a .unity3d file?

This may be a slightly silly question, but I have an entire .unity3d file weighing 2GB and I want to see what’s inside it. I downloaded Unity Hub and Unity 6000.0.34f1, but I don’t really understand how to open the file. Is this possible and if so, how do I do it?

That’s likely an old Unity WebPlayer project. The Webplayer has been deprecated over 10 years ago.

Generally speaking, you cannot open build outputs of Unity projects in the Unity editor. You have to have access to the Unity project itself.

There are tools that allow you to extract some data (ie textures, meshes) from a build output, but probably not from a WebPlayer build. In any case, that data will likely be illegal to distribute for any intents and purposes (copyright).

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