Following the North American leg of the tour, the band performed at several European summer music festivals including Glastonbury, Roskilde, Viva, StereoLeto, TRNSMT, Dour, Y Not, Haldern Pop, and Ypsigrock.

[10] According to lead singer Grian Chatten, the album's name was inspired by a line in a play by Irish writer Brendan Behan.

Chatten said the album title is "an effort to balance sincerity and insincerity, but more broadly it's about the battle between happiness and depression, and the trust issues that can form tied to both of those feelings".

[10][9] The album cover features a statue of the Irish mythological demigod Cú Chulainn entitled "The Dying Cuchulain" by Oliver Sheppard.

At aggregating website Metacritic, A Hero's Death has received a normalised rating of 84, based on 23 critical reviews, indicating "universal acclaim".

[15] Writing for Pitchfork, Elizabeth Nelson gave the album an 8.1 out of 10, describe A Hero's Death as "heady, funny, and fearless."

Nelson summarised the album as "a maudlin and manic triumph, a horror movie shot as comedy, equal parts future-shocked and handcuffed to history.

Liam Martin, writing for AllMusic, awarded the album three-and-a-half stars out of five, feeling that their sophomore effort was not up to par with their debut, Dogrel.

[26] "It was sort of like a weird sense of being flattered because the idea that a massive corporation is afraid of losing face to a group of lads from Dublin is hilarious to me," Chatten said about the chart battle.