Their first full-length album was released on Dead Teenager Records, titled Our Gang's Dark Oath;it was recorded while Jake Davison and Angel were still in high school, being released shortly after they had left.
In 2004, the band were signed to Victory Records. Their second album, and debut for Victory Records, was released October 4, 2005 and was titled Nightmare Anatomy, which is an album of nightmares and features themes of waking up, nightmares, brought together to symbolise times when life is at its worst.
In 2006, they contributed a remix of "The Last Sunrise" for the soundtrack to Underworld: Evolution, and had their song "Die Romantic" featured on the EA Sports' game NCAA MVP Baseball 2006. Aiden was also part of the 2006 Kerrang Awards in August, taking home the award of "Best International Newcomer", and was part of the Kerrang XXV tour in January 2006. In May and June of that year, Aiden toured with the Finnish band HIM. They also played the 2006 Warped Tour that summer.
On October 31st, 2006, Aiden released an EP/DVD titled Rain In Hell. While the CD didn't receive rave reviews, the acoustic track 'Silent Eyes' and the ethereal opening track 'A Candlelight Intro' hint towards a broadening of Aiden's musical style. The DVD includes 3 music videos and the live performance of Aiden's Never Sleep Again Tour in Chicago. In October-November 2006, Aiden played the "Never Shave Again Tour" with Silverstein and It Dies Today.
In April 2007, Aiden played an arena tour of the UK supporting Lostprophets with Taking Back Sunday. Aiden also played the 2007 "Taste Of Chaos" North American Tour alongside The Used, 30 Seconds to Mars, Senses Fail, Saosin, Chiodos, and Evaline. They are currently playing a West Coast tour, and will play a national tour in August-September 2007 with From Autumn to Ashes. After that, they will play the International Taste of Chaos tour in late 2007.
The band's third studio album entitled 'Conviction' will be released August 21, 2007 The new single "One Love" has recently been uploaded to Aiden's Myspace profile. It will be available on iTunes on August 14th accompanied by a music video.
Some of the opinions are that the group dishonors AFI by imitating the sound AFI took over a decade to develop. However, Aiden receives strong support from media outlets such as Kerrang! who placed the band on the front cover of its magazine three times.
They were repeatedly bottled at both the Download Festival and the Reading Festival. They have also received critisism for having 3 releases in 2006 alone- a split EP, a re-release of Our Gangs Dark Oath and the EP Rain In Hell.