In 2013, lead singer Geoff Tate explained the band's dissatisfaction with the album's mix: "The only time I ever experienced [a record label restricting creative freedom] was during the recording of Queensrÿche's first album, The Warning. We went $300,000 over budget and the label took the record out of our hands and gave it to someone else to mix. (...) The guy that mixed the album had no clue what Queensrÿche was. He never listened to hard rock music and didn't take input from anyone in the band. He just mixed it according to how he thought it should sound. No one in the band could listen to that record. We all hated it."
The Warning featured more progressive elements than the EP. It was a moderate commercial success in the United States, although none of the singles charted domestically. However, "Take Hold of the Flame" was a hit internationally, particularly in Japan.
In support of the release, Queensrÿche went on a worldwide tour from August 1984 through to July 1985. During the American leg of their tour, they were the opening act for Kiss on their Animalize tour.
The album's original track sequence and sound mix that the band had approved, was changed by mix engineer Val Garay under orders from EMI-America, against the wishes of the band. The band first learned of this in August 1984, while on tour in Japan.