Superhero was originally self-released, and later repressed and released alongside Crooked on Dyslexic Records. A few songs were released exclusively on now out-of-print compilations, and thus remain unavailable.
The initial distribution of the Superhero album started with an independent release, followed by a limited run alongside Crooked on Dyslexic Records. Some songs were only available through now-defunct compilation albums, making them hard to get.