After attending a
children's music concert with his own children,
Mirka Rantanen decided to start a heavy metal band for children. Rantanen and his friends from the Finnish "
metalhead" community began writing and recording songs. Hevisaurus has released seven albums to date and the albums have sold over 170,000 copies alone in Finland. Localised versions of Hevisaurus’ albums can also be found in Spanish, Hungarian, Swedish and German. The album ”Hirmuliskojen Yö” (Night of the Dinosaurs) was the 2nd most sold album in Finland in 2010, when the band was rewarded with the best children album Emma (Finnish equivalent to Grammy).
The Dudesons and Hevisaurus opened up an indoor amusement park to
Oulu’s Super Park in April 2013, offering Hevisaurus themed birthday party packages. The band also has its own Hevisaurus game for
Android and
iOS devices. In the game, players must finish the levels while listening to the band’s songs. The application also includes mini-games like puzzles. The application was released in 2013. Hevisaurus have their photo on the walls of
Hard Rock Café and have also been listed in the Hard Rock Café’s international database of artists/bands. They are the second Finnish band, besides
Amorphis, who have received the honor. A version of the band appeared on
Spain's Got Talent in November of 2024, using the Argentinian's versions name and recent iterations of the German bands dinosaur suits with a Spanish singer. A video of the audition was released on the
Spain's Got Talent YouTube channel, with the group receiving three yes' and being able to move on to the next round. Another version of the band appeared on the
18th season of
Britain's Got Talent. They performed a medley of
Queen's
We Will Rock You and
Bon Jovi's
Livin' on a Prayer, receiving four yes'. The english version was disqualified in the next round. According to their social media pages, the band will perform their first show in August of 2026 at Bloodstock ==Premise==