Unspoiled by Progress: 20 Years of Hardcore Blues is the second compilation album by American blues rock musician Walter Trout. Released on June 23, 2009, by Provogue Records, it features previously unreleased recordings from across Trout's solo career, including live tracks and radio recordings, as well as three new studio tracks. The album reached number 5 on the US Billboard Blues Albums chart and number 10 on the UK Jazz & Blues Albums Chart.
