Undertale

Undertale redefined RPG conventions in 2015 by allowing players to complete the entire game without a single kill, a radical departure from many contemporary titles. Developed largely by Toby Fox with a modest $51,000 Kickstarter budget, the game's meta-narrative, where the "genocide route" permanently alters future playthroughs, captivated audiences. Selling over 5 million copies, Undertale's success is further cemented by its iconic soundtrack, including the track "Megalovania" which alone boasts 2.6 billion Spotify streams. This achievement highlights how a solo developer can create a title with a cultural footprint rivaling that of much larger studios.