[5] Fred Pessaro, writing for Vice magazine's Noisey site, stated that the music of Oblivion Hymns is "expansive and dramatic ambient post-rock… the kind that would fit perfectly as a soundtrack to a film.

"[6] In his review for KEXP, Don Yates notes how Hammock "reworks their ambient post-rock sound on their latest album, moving in a more neo classical musical direction while adding a string quartet, horns, accordion, glockenspiel, a children’s choir and more to their layers of atmospheric shoegazer guitars for an often-transportive set of glacial instrumentals.

7 in the KEXP Variety Music Chart for December 2013 and named the first track, "My Mind Was a Fog... My Heart Became a Bomb" as Song of the Day on January 8, 2014.

[8][9] Raul Stanciu, writing for Sputnikmusic, felt that Oblivion Hymns is a "natural progression to [Hammock's] transcending discography.

This neoclassical-meets-post-rock direction opens new doors…",[2] while Elizabeth Klisiewicz, writing for The Big Takeover, described how songs on the record are "stuffed full of emotion, as [one] can imagine… standing on the edge of an infinite abyss, marvelling… Hammock’s music draws out such powerful emotions that one can be blinded with joy even while tears blur your vision.