Everything you need in one package, for Windows, Linux, and macOS. Check our website for the release post and/or Linux distro-specific packages.
Once extracted, also extract the system specific archive (like linux-amd64.zip) in a way the contained file (for example “daemon”) is next to the “pkg” directory.
Look at the README!!!
You may prefer using the launcher (especially on macOS!): Unvanquished.net