Ruiner, released on August 16, 2005 through Nitro Records, is the fourth full-length album from the Massachusetts-based melodic hardcore band A Wilhelm Scream, and their second album since changing their name from Smackin' Isaiah in 2002. It received mostly very favourable reviews.

A Wilhelm Scream is a melodic hardcore band from New Bedford, Massachusetts, formed in 1999. Their music has been compared to Strung Out, Hot Water Music, Propagandhi, and Strike Anywhere as the band's similar artists. Their name is a reference to the Wilhelm scream, a famous stock sound effect mainly used in films. The band previously went by the names Koen, Adam's Crack, and Smackin' Isaiah, though the last was the only name to be used in any major releases. "The reason for the name changes from Koen to Smackin' Isaiah, then to A Wilhelm Scream was really a matter of them adding new members, and progressing/maturing as a band."