31: The Gambler

Before the game, each player rolls a die to determine which rarity of weapons and traps they may use in the defense. Players who roll a 6 may use equipment of any rarity, including legendary. Players who roll a 5 must use Epic (or lower) equipment. Players who roll a 4, 3, or 2 must use only Rare, Uncommon, or Common (grey) equipment. Players who roll a 1 may only use combat abilities.

32: The Saboteur

Before starting a 4-player mission, one player is chosen as the Saboteur. The Saboteur cannot destroy player-built structures, but may do anything else within their power to disrupt their teammates by editing walls, affecting mob pathing, body blocking, and shooting at propane tanks. The team wins if the mission is completely succesfully, the Saboteur wins if the mission is failed.

Bonus challenge: the remaining teammates must roll a second strat and abide by its rules during the mission.

33: Teamwork (Part 2)

Each player must specialize in one task for the duration of the mission. One player may only build and repair, one player may only use ranged weapons, one player may only use abilities and gadgets, and one player may only use explosives.

34: The Indirect Approach

Players may only use indirect sources of damage to kill mobs. This includes splash damage from explosive weapons, bouncing projectiles (e.g. the Space Pistol), fall damage, and area-of-effect damage from traps and abilities.
For a less challenging variant, players may also use damage-over-time traps and abilities.

35: The For Honor

Players must use only melee weapons and play in First Person perspective.