It’s ironic that the band who released an album summing up alternative rock was in many ways an outsider to the rest of the scene. Many of the bands came out of a punk tradition where the ultimate sin is acting like pompous, self-centered rock stars. But that’s exactly what they were — especially Billy Corgan, the band’s dictator of a leader, who rivals Kanye West for having the most bloated ego in music history. Unlike the other alternative bands who eschewed fame, or at least wanted to look like they didn’t want to be famous, Corgan was explicit about his desire for the Pumpkins to be recognized as the best and biggest band in the world. And they certainly looked the part, being the only alternative band to fully embrace the glammed out rock star look.

Musically, the difference between Corgan and his peers was just as apparent. On their previous album, Siamese Dream, he famously layered dozens of guitar tracks on each song to make the album sound as grandiose as possible —Mellon Collie co-producer Flood calls this the “Pumpkin Guitar Overdub Army” tactic. When asked about this in a Guitar World interview, Corgan said “When you are faced with making a permanent recorded representation of a song, why not endow it with the grandest possible vision?” But his peers thought the exact opposite. Most alternative bands wanted their records to sound exactly how they performed live, without any studio frills. For those bands this was an important sign of authenticity that they learned from their punk rock upbringing. But Corgan was a maximalist at heart, growing up inspired by flashy arena rock and metal bands rather than the punk rock that inspired most of the scene.

Corgan’s “grandest possible vision” philosophy is laid out in full display on Mellon Collie — it’s an incredibly long and bloated journey. It opens with a three minute piano intro saturated in strings and woodwinds that makes it sound like its straight out of an old Hollywood cinema classic. And over the next 27 songs they do everything from electronic ballads (“Beautiful”) to pop-rock (“Muzzle”) to obnoxious, borderline unlistenable, metal (“X.Y.U.” and “Tales of a Scorched Earth”). Even the album’s most subtle moments sound like they’re added in to make the big moments sound absolutely huge.

This kind of sprawling epic wasn’t what typically sold in 1995, but it became a sensation because of Corgan’s ability to balance out his experimental side with the ability to write different kinds of hit singles that appealed to different audiences. Songs like “Bullet With Butterfly Wings” and “Zero” were as nihilistic and heavy as any Soundgarden single, while the soaring ballads “Tonight Tonight” and “1979” fit perfectly in the new softer landscape they found themselves in. As different as these songs are from one another, they all became smash hits. This diversity is how they managed to become the most successful band in the world — if only briefly — in such a wildly transitional year for music.