Ultramega OK is the debut studio album by American rock band Soundgarden, released on October 31, 1988, by SST Records. Following the release of the EPs Screaming Life (1987) and Fopp (1988), both for the Sub Pop record label, Soundgarden signed with SST and went to work on their debut full-length. The resulting album contained elements of psychedelic rock, hard rock, heavy metal and hardcore punk. The band supported the album with a tour in the United States, as well as its first overseas tour.