...To Be Left Alone

...To Be Left Alone is a challenge in Risk of Rain 2.

It unlocks the the character Acrid, added in the Hidden Realms update. This challenge is completed be leaving the Bazaar Between Time through the Null Portal below the Blue Portal, then completing the 9-wave challenge presented for the player.

Trivia
The name of this challenge refers to the ending quote when completing the game as Acrid