The 3rd album Apocalypse was the first concept album written by the band. The sound was even more mature and offered the same techniques, both in melody and aggression. The Caruso brothers completed the production themselves by both recording and mixing. The album also got enthusiastic feedback in Japan where the 'Avalon/Marquee' label released the album with a bonus track titled Epilogue. This album saw Arachnes continue to increase their sales and positive reviews.
Primary Fear featuring the Tota Pulchra a song recorded in a church with a real church-organ and composed by the Maestro F.Castelli, and a cover song of Eruption taken from the Prog-Rock Tarkus by E.L.P. tracks proved to further progress their aggressive power metal feel. Again the Japanese version will feature a bonus track and will be released by 'Marquee/Avalon'. In Praise of Science (2006) and A New Day (2011).