The band strikes up playing at well-known metal clubs, as Rainbow Club (Milan), Thunder Road (Codevilla) and Transilvania Live (Milan). HaddaH participates to many festivals, such as the Distortion 2 Days 2005 and the Absolute Rock Festival 2005, sharing the stage with several bands as SKW, Crust (Sadist’s side project), Morkobot, Guilty Method, Yak and many more bands.

In 2005 "From Happiness To Disgrace" EP was released ("demo of the month" for Metal Maniac magazine Jan.2006). FHTD is recorded and mastered by Max Lotti (Komaday, Time Machine, Valas, Macbeth, Drakkar) at JRS Studio (Milan). The sound is influenced by numetal and metalcore both, and embellished by female vocals and samples.

The sound becomes strong and more aggressive, the songwriting more "European". "Sun?" demo is produced, recorded and mastered at the Mofo Studio (Piacenza) by Marco Gandolfi (Bobby Kimball, Carmine Appice, Ken

Hensley, Bernie Marsden and many others) during 2006. The band grows up supporting the underground scene, as shown by the increasing number of live gigs. In 2009, during pre-production of the first full length, the project stops because of personal problems of some members.

With a renewed lineup, HaddaH comes back with a more extreme and violent sound, enjoying modern death "in your face" metal. The melodic component that emerges from some tracks is inspired by the epic and mythological themes narrated in the lyrics.

In 2011, HaddaH produces a promo CD containing three demo tracks previews of the album in working. At the same time, live practise carries on, with HaddaH ever active, as headliner or supporting bands like Cadaveric Crematorium, Masha/Exilia, Hammercult e Sepultura, and also semifinalist at Metal For Emergency Contest 2013. Working again with Marco Gandolfi (Mofo Studio), HaddaH enters the studio to complete the first full length album titled "Through The Gates Of Evangelia". For the album distributions, they sign a deal with the historic Italian label Beyond…Productions that, headed by Giovanni Indorato, has worked with bands as Sadist, Theatres des Vampires, Drastique, Spite Extreme Wing, Antropofagus, Ensoph, Paul Chain, Satarial, Infection Code and many more.