Undertale

Undertale's self-composed score by Toby Fox is a cultural phenomenon, achieving over 100 million views for its most famous track "Megalovania" on YouTube alone. The 101-track soundtrack uses chiptune-based melodies to evoke nostalgia while innovating with complex thematic variations, as each major character has a unique leitmotif that evolves across multiple encounters. This depth outperforms #7 Hades' prog rock in emotional impact per note, as Fox's simplistic arrangements carry heavy narrative weight. With a 93% user rating on Steam and the track "Hopes and Dreams" inspiring thousands of fan covers, the score's ability to make a 2-hour playthrough feel epic is cheaper than the average orchestral endeavor in production cost but yields richer emotional returns. It's a testament that constraints breed creativity, as Fox composed the entire album using free software, yet the final product stands among the most beloved game soundtracks of all time.