Into the Unknown is the second album by Bad Religion, which was released in 1983.
The album was a major change from their previous style, delving into progressive rock heavy in keyboards, though it wasn't at all popular as fans at the time were confused by the sudden style shift. When the band released the 1991 compilation album 80-85, a collection of recordings before their third album Suffer, Into the Unknown was not part of the compilation, also partly due to the band changing their style.
The album was followed up by the 1984 EP Back to the Known, which, as the title implies, was a return to Bad Religion's punk roots.
Only 10,000 copies were produced and distributed, but almost all were quickly returned to Epitaph's warehouse. Guitarist Brett Gurewitz jokingly recalls having "[sent out] ten thousand copies and [getting] eleven thousand back." However, many did in fact end up in the hands of fans, when Brett Gurewitz's girlfriend Suzy Shaw, who worked at the warehouse, surreptitiously sold all but 300 of them.
The album is generally disowned by the band, and there has never been a second pressing. Despite it's abandonment however, it has become highly desirable and is now something of a collector's item. The band has commented on the album on their site saying that they are not trying to hide it from fans, and that "anyone who listens to it will understand why they have never re-released it".