There are multiple artists with this name:
1) Atrox is a progressive metal band from Norway
2) Atrox is a powernoise project from Germany
3) Atrox was a death metal from Germany
4) Atrox is a hardcore punk band from Italy
5) Atrox is a black metal from France
6) Atrox was a speed metal band from Sweden
7) Atrox is a hardcore punk band from Germany
8) Atrox was a punk band from UK
9) Atrox is a thrash metal band from Colombia
10) Atrox is a melodic metal band from Pakistan

Read more about Atrox on Last.fm.