Hardestmode

Hardestmode is an even more difficult version of the normal game, causing the king's life to be hell while also providing the citizens with an abundance of upgrades and incentives to kill the king. It is unlocked after completing Hardmode. There is no Post-Hardestmode yet. It is enabled inside the castle when you become king in between the Economics Room and the Hearth.

Modifications
Hardestmode makes the game insanely difficult, and it has various effects to make this the case.