Complex sentence: It is incorrectly listed as a demo in the 2007 remastered version of Hidden Treasures but is actually the final version with all the guitar parts, it also appeared on the "Warchest" later that year and was the first Megadeth release to have this listed correctly.
Split into simpler sentences: It is incorrectly listed as a demo on the 2007 remastered version of "Hidden Treasures" but is actually the final version with all the guitar parts. It also appeared on "Warchest" later that year and was the first Megadeth release to have this listed correctly.