21: The Simon Says

Before the mission one player is chosen to be Simon. The other players cannot switch weapons, reload, place traps or walls, or use abilities without first asking for (and receiving) Simon's verbal permission. Simon may optionally refuse permission to players who do not say "please". Voice chat required.

22: The Descent Into Madness

Players must swap the keybinds for primary fire and jump.

23: The Buddy System

Players split into two pairs of Buddies. Players must endeavor to remain on the same tile as their Buddy at all times, lest they become lost.

24: The Traffic Cop

At the beginning of an Encampment mission, one player is chosen to direct traffic. Players can only move when the Traffic Cop says "GO", however they may not fire their weapons again until they are told to "STOP" and fight. Players who disobey the Traffic Cop, even accidentally, must run back to tag spawn before returning to the fight.

25: The Swiss Cheese

Players may only build walls and floors, and all structures must have at least one editing square removed. Walls with a door are not allowed unless there is also a window.

26: The Viking

Players must only use Axes and Crossbows to kill mobs. For bonus challenge, players should speak with a grizzled Nordic accent

27: The Blink and You'll Miss It

Players may only use Outlanders with Phase Shift and short-range weapons (under 2048 Range stat). This includes many shotguns, the Dragon and Firecracker pistols, and some Energy weapons.

28: The Permanent Press

Once placed, structures cannot be edited, destroyed, or repaired by players. This includes the Power Modulation trait, the Banner gadget, or any other form of structure repair.

29: The Spray and Pray

Players are not allowed to aim down sights.

Bonus challenge: complete a Destroy the Encampments mission.

30: The Minefield

Complete a Category 4 Storm mission. Using full floors, cover as much of the area around/between the atlases as possible, and place a player launcher trap on each floor. During the defense, players may only stand on tiles which contain a player launcher.