Finding a full, free version of Dance Central for PC is complicated because the series was primarily designed for Xbox Kinect and VR platforms. There is released by the developer, Harmonix . 🕹️ Where to Play Dance Central
You may find "Free Full Version" downloads on unofficial sites, but these are often and could contain malware. However, some fans have created community tools: dance-central-free-download-pc-game-full-version
There is a community-driven repository on GitHub for a "Deluxe" version that modders use to enhance the original game. This typically requires original game files and is for advanced users. Finding a full, free version of Dance Central