[8] While the group were initially simply recording cover songs to release online, Metroid Metal made their live debut at MAGFest 7 in 2009, and became a recurring act at the event.
[9] Stemage along with the other musicians from Metroid Metal Live formed the "backbone" of Yes Mayhem, a second band that produced original material beginning in 2010.
[12][13] The new incarnation of the band released their debut studio album Legion later that year while continuing the annual Danse Macabre projects that Stemage had been involved in earlier.
[16][17] In addition to the opening theme for the second season of Cartoon Network's Steven Universe, Stemage worked on guitars throughout the remainder of the show.
[22] In 2018, Stemage joined a band called Super Strikers, along with video game composers Keiji Yamagishi and Manami Matsumae.
[23] From the late 2010s onwards, Stemage worked on a number of game soundtracks including Card of Darkness (2019), Ikenfell (2020) and Hextech Mayhem (2021), both as a composer and as a session guitarist.