Genocide Route

The Genocide Route makes up one of the three main possible Endings to be found in Undertale. It can be achieved in any play through with no pre-requisites, although any subsequent Pacifist Routes will have their Epilogue slightly altered, even with a True Reset.

Method
The Genocide Route is achieved by killing every enemy in every region- Ruins, Snowdin Forest, Hotland/Core (For the Genocide Route the Hotland and Core have the same enemy count). As a note, this does not mean that every encountered enemy is killed, but rather that every enemy is killed in each area until encounters no longer occur (This number is displayed at save points).

Additionally, all bosses must be killed.