rated this album 4 out of 5, pointing out the attention to detail and stating that it results in "an involving listen, but emphatically doesn't detract from the band's primary intention of rearranging your skeletal structure through elastic, chugging riffs and neck-snapping beats".

"[6] Pitchfork editors chose ...So Unknown as one of the 10 albums of the week for readers to hear[12] and critic Matthew Ismael Ruiz scored it a 7.3 out of 10 as a band that "boast a unique mix of aggressive East Coast grooves and call-and-response vocals, offsetting metal's melodic and theatrical tendencies with hardcore's propulsive energy" and particularly noting the virtuosity of drummer Luis Aponte.

[7] Rolling Stone critic Ian Blau awarded the album four stars out of five, stating that the band "avoid the repetitive and rough aspects of their debut by growing exponentially as musicians, focusing their songwriting, and becoming more capable of translating the energy of their live show into nuanced studio performances".

[1] In Slant Magazine, Steve Erickson gave this release 3.5 out of 5 stars, characterizing it as "the album feels more defined by genre than the band's past work, but the anger running through it is contagious" and summing up that the music "creates a stark contrast to the majority of recent pop-rock, which carries a mood of depressed resignation".

[14] On June 23, Alternative Press published an unranked list of the top 25 albums of the year to date and included this release, calling it "a chaotic listen from start to end, brimming with metallic aggression, savage breakdowns, and smart songcraft".