Mega Bog showcases the sophisticated lo-fi of songwriter/multi-instrumentalist Erin Birgy, who has recorded both alone and with a shifting collective of musician friends. Birgy herself has contributed to albums by acts including Big Thief, EZTV, singer/songwriter Jaye Bartell, and frequent collaborator Iji. Her work as Mega Bog grew from amorphous beginnings on limited-run cassette releases to the detailed and mysterious songcraft of albums like 2014's Gone Banana and 2021's Life & Another. She smoothed surfaces somewhat for the project's sixth long-player, 2023's groove-heavy End of Everything, which was written on keyboard instruments instead of guitar.

Mega Bog formed in Seattle in 2009 when Birgy started sharing songs and playing with a group of musicians who originally got together for a swimming trip. The project came to be recognized for its free-form song structures, dissonance, and quietly trippy arrangements combining electric guitars, saxophone, drums, keyboards, and occasional field recordings behind poetic vocals. The jazz influence was apparent on the band's label debut, Okay Human, released by Gnome Life in 2011. The Some UFO EP followed in 2012, and Mega Bog's sophomore album, Gone Banana, arrived on Couple Skate in 2014.

Birgy then relocated to Brooklyn, where she collaborated with bands like EZTV and Big Thief before issuing Happy Together on Nicey Music in 2017. Released instead on Paradise of Bachelors, fourth album Dolphine arrived in 2019, a vaporous and spindly collection of Birgy's most refined and well-arranged tracks up until that point. For her next album, Birgy worked with Big Thief's James Krivchenia as co-producer, utilizing various studio spaces to realize a set of songs that ruminated on memory, death, and the strange details of everyday existence. The album, Life & Another, included additional contributions from members of Hand Habits, Lake, and more, and arrived on Paradise of Bachelors in July 2021.

Following a move to the Mexican Summer label, Mega Bog was back with another guest-studded album, End of Everything, in May 2023. Written by Birgy on piano and synthesizers instead of her usual guitar, the groove-anchored set was again co-produced by Krivchenia and included contributions from Hand Habits' Meg Duffy, TOPS' Jackson MacIntosh, and Westerman's Will Westerman, among others. ~ Marcy Donelson