|Early Incarnation (2003)
In 2003, Daron Malakian (lead guitar), Casey Chaos (vocals), Zach Hill (drums), and Greg Kelso (rhythm guitar) recorded a demo tape entitled "Ghetto Blaster Rehearsals" credited to the name Scars on Broadway. However, in 2007, an official letter on the band's website states that these tracks are not in any way affiliated to Scars on Broadway as it exists today and that the music is from a disbanded project from 4 years ago.
 Scars on Broadway (2005-present)
In December 2005, Malakian stated in an interview that he "could release ten solo records tomorrow." and that he has"tons of material laying around. After these albums, - (Mezmerize and Hypnotize) - I'm gonna go off to learn how to brain and do something on my own, just like Serj. And no, System of a Down is not breaking up. We're just gonna do like KISS and put out our own solo records."
Following System's hiatus, Malakian announced his latest project - Scars on Broadway - a band which would include System of a Down bassist, Shavo Odadjian, and himself. Ultimately, Odadjian was not involved with the band, and instead System drummer, John Dolmayan became a member.
The band's website featured a countdown timer, counting down to 15:00 PST of March 28, 2008. Additionally, above the timer, in quotation marks was the phrase "They say it's all about to end." When the countdown ended, the song "They Say" was made available on the site. The song is also available for listening on the band's official MySpace page, it is no longer available for free download.
Scars on Broadway played their first live show April 11, 2008 at the Whisky A Go Go in Los Angeles, CA. They have also confirmed to be playing with Metallica at KFMA Day 2008 in Tucson, AZ. On January 22, 2008 Scars on Broadway were announced to be performing at the Coachella Valley Music and Arts Festival on April 26, 2008. On May 17th of that year, the band also performed at the sixteenth annual KROQ Weenie Roast. Additional tour dates were announced on their official website on the 30th of May .
On May 2, 2008, Scars announced on their official website that their debut album, Scars on Broadway, will be released on the 28th and 29th of July.
Starting from May 28th, 2008, "They Say" is available for purchase at iTunes Music store. On July 20th, 2008, "They Say" was featured as iTunes' Free Single of the Week. On June 20th Scars on Broadway released a teaser for their single "They Say" on a MySpace bulletin. In the teaser, the video is said to premiere soon.
The video for their first single "They Say" premiered on Yahoo's music page on June 27th. The song "Chemicals" was made available to listen to on the band's MySpace page on July 8.
On July 25th, it was announced that "They Say" would be a downloadable track for the video game Rock Band on July 29 for Xbox 360 and July 31 for PS3. 
On July 28th 2008, Scars On Broadway was released to critical acclaim, with Kerrang! giving it a rare '5 K' rating.