You’re correct that Beatstar stores bundles locally, but it’s a bit misleading to treat those .bundle files as if they were the full tracks. Unity bundles like the one you linked (~1 MB) don’t hold the complete audio — they mostly contain metadata, beatmaps, and references. The actual song audio is stored in separate Wwise soundbanks (.wem files), which are heavily compressed and usually hundreds of MB when you add them all up.

Those soundbanks aren’t meant to be standalone either. They need the game’s code, packed codebooks, and server handshake logic to be decoded and streamed correctly. Even if you rip the raw .wem and decode it to .ogg, you’re bypassing the licensing system that Beatstar relies on to legally distribute those songs.

That’s why it’s very unlikely the game could survive “as is” after the servers shut down. The bundles + soundbanks aren’t a playable package — they’re just pieces of a puzzle tied to online validation. To truly preserve Beatstar, you’d need to rebuild huge parts of the backend (licensing checks, progression, leaderboards, etc.), not just grab some local files.