When enabled, Challenge Mode halves your HP and prevents you from regenerating health, adding more difficulty to your matches. The Challenge Mode also multiplies the KR gained by 1.5x, increasing your rewards.
Challenge Mode is disabled by default.
How to Enable Challenge Mode on Krunker.io?
To enable Challenge Mode, navigate to the game Settings:
Enable the Advanced Settings on the Toggle next to the search bar:
IN the Controls tab, in the Gameplay section, you will find the Challenge Mode option:
You must be level 30 to enable challenge mode.