There are multiple artists with this name: 1). Stress is a Heavy Metal group from Brazil - formed in 1977. They started off in a northern Brazilian area called Belém, which is the capital state of Pará. They are often discredited for considerably being the first Thrash Metal band before Metallica was claimed to release their popular "Kill 'Em All". The lead member of Stress Roosevelt "Bala" Cavalcante also did state that they were as fast and aggressive as Kill 'Em All.