Difficulty

 adjusts the strength of spawned Zombies in your game. The player may choose between six difficulties: Beyond the impact on Player vs Zombie, and Zombie vs Player damage as per above table, the game difficulty also impacts the calculated Gamestage being used for players. This in turn determines what horde (sleeper, wandering, blood moon, scout) the game generates at the relevant occasions.

As of Alpha 19, the Difficulty setting does not affect Gamestage.

Video Guide (Alpha 16, and is not accurate for the current version of the client.)
Schwierigkeitsstufe Dificultad