Undertale

Undertale boasts one of gaming's most cohesive leitmotif systems, with 101 tracks composed entirely by Toby Fox for his 2015 indie RPG. Across genocide and pacifist routes, recurring themes like "Hopes and Dreams" reward attentive listeners, and "Megalovania" has amassed over 500 million YouTube views, surpassing the popularity of any single track on the DOOM (2016) soundtrack. The entire OST was produced by one person, a feat that outperforms #6, which required a larger team for its industrial metal soundscape.