Piano Tiles 2 - Beethoven Virus (custom song) Virus is a mod stage in Piano Tiles 2. The difficulty in this song is Medium. This stage is a real melody to Sonata Pathetique Mvt. 3, that is now a virus version in the original. Also called Beautiful Day or Beethoven Unleashed V3. Retrieved from "https://piano-tiles.fandom.com/wiki/Virus?oldid=19637" Categories: Infobox Number Mismatch Infobox PrevStage Update Needed Infobox NextStage Update Needed Unlocked by Level Up Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.