Ezekiel and Cory began collaborating on Over-reactor material in January, 2010. By the end of February, the pair had worked the original demos into the basis for an album.
In March they released their first track “Fuck You Myspace.” The track was available exclusively on Myspace as a free download. The Over-reactor website was launched complete with a music player featuring The Evil Hamlet, a dark spoken word piece set to organ and horror movie samples.
Over-reactor first performed live on May 30 at The Espy Gershwin room, St Kilda. The next shows were supporting COG, June 11 at the Metro Theatre, Sydney, and June 12 at The Tivoli Theatre, Brisbane.
On August 9, the seventeen track album Lose Your Delusion I was released through the Over-reactor website.
The second album, Lose Your Delusion Too, was released through the Over-reactor website on December 16.
In February 2011, a compilation of the best songs from the first two albums as voted by fans was released, titled Lose Your Delusion. Over-reactor toured Australia from March trough May in support of the release.
In June 2011, Over-reactor supported Karnivool on 21 dates of their their Australian tour.
Over-reactor released album Mouth of the Ghetto on June 7, 2012. They are currently touring Australia in support of the album.