Empower this hero's spear! There'll be no more pain. This is similar to level-grinding, which …Their hopes and dreams. Starting in the Ruins, the protagonist repeatedly triggers encounters to kill all monsters.

Undertale genocide The Genocide Route occurs when the protagonist kills every enemy (including mini, mid and main bosses) in every region: the Ruins, Snowdin Forest, Waterfall, and Hotland (the CORE is a sub-region of Hotland).