[3][7][11] One of these early songs, "Commander Shepard", based on the character from the Mass Effect series of the same name, went viral and eventually amassed millions of views, leading to a rapid rise in popularity for the musician.

[15][16] BioWare subsequently sent Dunne advance footage for use in making a song and accompanying music video based on Mass Effect 3, so that his release of "Take it Back" could coincide with the game's launch.

[3] A line from his song "Commander Shepard" was also referenced in Mass Effect 3, with a character telling the player to "fight like a Krogan.

His song based on the indie CRPG Wasteland 2, titled "Cries of a Dead World" was included in the game itself, being used for the end credits.

[27] Shortly before the Wasteland 2 Director's Cut re-release in 2015, Dunne released a parody of the Dire Straits song "Money for Nothing", titled "I want my RPG".

[33][34] He has written two songs about the Uncharted franchise "Keep Drifting" and "Here we go Again", inspired by the main character's sense of adventure and being a drifter at heart.

[36] In late 2016, he released "Pawns of War", a Battlefield 1 inspired song where Dunne's goal was to fuse the feel of the game's soundtrack with old military marching tunes, creating a composition that focuses on soldiers doomed to be forgotten after being thrown into the "meat grinder" of WWI.

[11] He provides most of the vocals for his songs himself, plays guitar, bass and keyboard, and can use electronic programs for drums and many other instruments, including orchestral pieces.

[11] He has worked with several guest vocalists; with Malukah on the song "Legends of the Frost",[38] with Irish singer Ailín Kennedy on "Lady of Worlds",[39] with YouTuber Sharm on "Fires Fade",[40][41][42] "Mother of Flame",[43] and "Machine Hearts",[44] with Lorna Dollery on "Dream of the Sky", "Dream of Goodbye", and "Evacuate",[45][46][47] and with singer Karliene on songs such as "Ascension",[48] "Lilac & Violet",[49][50] and "My Odyssey".

He left the show after episode 250, citing being blocked on Twitter by unnamed figures in the videogame industry who had been criticized by Sterling and/or Dale on the podcast.

[54] In late May 2018, Gavin was featured as a guest artist on the Dark Souls-inspired titular track "Let There Be Fire" from the album of the same name by Florida-based musician Aviators.

Though the incident was resolved successfully, Dunne commented that although TuneCore was trying to help artists, their efforts did more damage than good and that he depends on let's plays and gaming videos to spread and popularise his music by word of mouth.