These are the official storefronts often linked from the developer’s website. Purchasing here usually provides a Steam key or a direct download link similar to GOG.
Then the dog started barking at his closet at 3 AM. And the save point appeared on his nightstand.
: If you've already installed the game through Steam and need to find the , right-click Undertale in your library, go to , and select Browse local files PCrisk.com