Nirvana and their grunge contemporaries, such as Pearl Jam, delivered a more direct, less polished rock sound. Pearl Jam released its debut album, "Ten", a month before "Nevermind" in 1991, but sales only picked up a year later. By the second half of 1992, "Ten" became a breakthrough success, being certified gold and reaching number two on the "Billboard" 200 album chart. Pearl Jam were famous for their fusion of riff-heavy stadium rock with the grit and anger of post-punk and grunge.