Project Clean Earth Chapter 50B Clear Guide

To clear Chapter 50B in Project Clean Earth, build Bernard with piercing or splash munitions to handle dense mutant clusters, and maintain continuous perimeter kiting around the outer edges of the arena. Avoid cutting through the center where enemy packs converge, and clear summoned minion waves immediately during the final boss encounter to keep your dodge lanes open.

Upgrade Priorities for Chapter 50B

Enemy density scales up within the first few minutes of Chapter 50B, making purely single-target weapons ineffective. You must build an active perimeter using wide-area attacks and automated support drones to prevent fast melee mutants from closing in. When selecting perks upon leveling up, prioritize durability and cooldown reduction over situational evasion perks.

Upgrade Category	Recommended Option	Combat Role
Primary Weapon	Piercing or Splash Munitions	Cleans out front-line swarms while damaging trailing enemies
Drone Module	Auto-Targeting Missile or Laser	Delivers sustained chip damage to bosses and distant threats
Utility Perk	Cooldown Reduction	Minimizes downtime between major area-of-effect bursts
Defensive Perk	Energy Barrier or Max HP Boost	Absorbs stray hits and provides a buffer to break out of tight crowds

Wave Kiting and Elite Tactics

Surviving the early- and mid-stage waves requires disciplined positioning:

Herd early spawns: Move along the arena perimeter during the first two minutes to group slow-moving mutants behind Bernard, letting your basic fire hit packed rows.
Avoid the center floor: Never cross through the center once enemy spawns accelerate, as inward movement traps you between converging packs.
Transition to wide diagonal loops: When swift, lunging predators appear in the mid-stage, expand your path to the arena boundaries. Move diagonally and reverse direction only when a wide gap opens.
Sweep for drops: Collect energy cells and experience items in quick sweep passes immediately after an area burst clears the path, then return to the edge.
Orbit elite mutants: Do not stand still to burn down elite enemies. Orbit them from a distance so splash munitions soften the elite while you keep normal mutants from encircling you.
Dodge telegraphed elite attacks: Make sharp 90-degree turns when an elite charges or launches toxic projectiles, as charging enemies commit to straight trajectories. If an elite leaves persistent damage pools, rotate immediately to an uncontaminated quadrant.

Chapter 50B Boss Strategy

The final boss encounter cycles between wide projectile spreads, frontal laser lines, and targeted charges. Establish maximum firing distance immediately upon entering the arena.

Move perpendicular to the boss: Run sideways relative to the boss's facing angle to sidestep frontal beams and projectile spreads without expending dashes early.
Clear summoned adds first: When the boss spawns auxiliary minions, shift Bernard's primary fire to wipe them out immediately. Leaving adds alive restricts your movement corridors and leads to unavoidable cornering.
Rely on drones for boss pressure: Keep automated drones firing on the boss while you focus your manual aim on minion control and safe movement.
Maintain an elliptical orbit: Once the floor is clear of extra enemies, resume wide elliptical kiting around the boss. Do not close distance for aggressive damage, as sudden multi-hit melee sweeps can end the run instantly.

Pre-Run Gear Preparation

Before starting Chapter 50B, equip gear that boosts base attack power, critical strike chance, and movement speed. High mobility gives you the speed required to outrun mid-stage lunging mutants and dodge elite charges cleanly. If you fail runs during wave phases, swap in modules that expand explosion radius or add knockback. If you reach the final encounter but run out of time or health, equip gear that boosts single-target damage to burn through the boss faster.