Gray produced their 1999 album, "Q2K", and plays on the 2001 live album and DVD, "Live Evolution". In 2000, Gray also collaborated with Queensrÿche drummer Scott Rockenfield and the Brother Cane members Damon Johnson and Roman Glick in the hard rock project Slave to the System, recording one eponymous album, which was released independently in 2002, and re-released in 2006 on Spitfire Records. In recent years, Gray's involvement with Queensrÿche has increased. Three Myth demos appeared on the collector's edition of Queensrÿche's 2007 release "", with the same song titles and partial overlap in lyrics with many classic Queensrÿche tracks. Gray and Jason Slater produced and engineered Queensrÿche's albums "American Soldier" in 2009 and "Dedicated to Chaos" in 2011, with Gray performing additional guitars and participating in the songwriting for both albums. Additionally, he contributed to Tate's second solo album, "Kings & Thieves", released in 2012. On September 1, Gray was announced to be part of a new Queensrÿche lineup with Tate Myth bandmate Gane is also part of this band. The band performed an """ Anniversary Tour" in 2013, celebrating the album's 25th anniversary.