2004 debut EPs

This Is What the Edge of Your Seat Was Made For is the first release by Bring Me the Horizon, released on 2 October 2004, through Thirty Days of Night Records in Australia and on 30 January 2005, through Visible Noise records in the UK. It was released on 25 September 2007 in the US through Earache Records. The original pressing, on Thirty Days of Night Records, was a strict run of only 1,000 copies. The album name comes from the first line of "Traitors Never Play Hangman".

The Three Words to Remember in Dealing with the End is the debut EP by Maryland pop punk band All Time Low, released in 2004 through label Emerald Moon Records. It is no longer available for purchase in any store or music outlet, nor is a digital copy attainable legally. Through an interview with All Time Low, it seems that Alex Gaskarth has the only known copy of the EP. His band mate Jack Barakat admitted that he does not even have a copy of it.

The Other Side is an acoustic EP by heavy metal band Godsmack, released on March 16, 2004. It includes several previously released songs re-recorded as acoustic versions, as well as three new acoustic tracks.

B-Sides is a compilation album of Damien Rice's b-sides from singles released from his album, O. The EP includes different takes of album tracks, such as live versions, acoustic versions, instrumental versions and a demo recording of hit single "Volcano" recorded onto Rice's cassette Walkman from 1997.

Fading Days is the debut EP from pop punk band Amber Pacific. The EP's title is mentioned in the song Everything We Were Has Become What We Are ("This is the last chapter of our fading days"), from Amber Pacific's album The Possibility and the Promise. Always You was later rerecorded and used on their debut album.

The Death of Me is the first solo EP by City and Colour, the pet project of Canadian musician Dallas Green. It was recorded in three days while his band, Alexisonfire, were taking a short break in between tours. Only 2000 copies were pressed and the EPs were only available at his early solo shows in Southern Ontario and is no longer available in print.

Wolfmother is the debut extended play (EP) by Australian rock band Wolfmother. Recorded and mixed at Ghetto Studios in Detroit, Michigan, USA, it was released in Australia on 27 September 2004 and later in the United States and the United Kingdom. The EP was produced and mastered by Jim Diamond and mixed by bassist and keyboardist Chris Ross; the album cover was designed by drummer Myles Heskett. All four songs from Wolfmother were later re-recorded for the band's self-titled debut studio album; "Dimension", "Woman" and "White Unicorn" were also released as singles from the album.

Hellogoodbye is the eponymous debut EP from Hellogoodbye. It was released on August 17, 2004 by Drive-Thru Records. All the vocals and instruments were recorded solely by Forrest Kline, except for the lead vocals on track 4, which were performed by Jesse Kurvink.

Elise Estrada is the self-titled debut extended play (EP) by Canadian recording artist Elise Estrada. It was released on April 15, 2004.

Vaakevandring is the first EP by Vaakevandring, it contains the original songs from their demo plus one bonus track entitled "To Find The Eternal Peace".