Challenges

When selecting the difficulty for each game (except for infinite mode and DM Mode), the player/host can choose to increase the difficulty through challenges, which stablishes some conditions that will make the game harder.

Challenges are currently chosen randomly from a list of thirteen or more effects. You can restart the level to receive different challenges.

Challenges
Cursed ground: Reviving takes three times longer.

Wrath of the Sheep God: Lose a life for each sheep death.

Hunger: No health drops.

Thirst: No potion drops.

No mercy: Life tickets cannot be used.

Loyalty: Stay within the leader's aura or take damage over time.

Spawn-o-rama: Spawners spawn mosters at double or triple speed.

Heavy burden: evading once will slow you down to 50% speed for three seconds.

X-Factor: Enemies regenerate 10% of their lives every second.

Chosen one: If the chosen player dies, the game is over and the DM wins.

Steroids: There seems to be two variants of this one; one where monsters have double hit points, and another one with triple hit points.