 Riverside can be described as a blend of atmospheric rock and metal elements, resulting in a sound similar to that of Porcupine Tree, The Mars Volta, Opeth, and Dream Theater, while still maintaining an identity of their own.One day near the turn of the millennium, during a short drive, Piotr Kozieradzki played Marillion in his car for Piotr Grudziński.While drummer Piotr 'Mitloff' Kozieradzki had played in two death metal bands, Dominion and Hate, and Piotr Grudziński had played guitar in a metal band, Unnamed, they both shared a deep affection for progressive rock.