Borderlands 4 Logo Borderlands 4

The Mole's Gambit Walkthrough

Your complete guide to completing Willem's sabotage mission in Borderlands 4

How to Unlock The Mole's Gambit in Borderlands 4

To start The Mole's Gambit side mission, you must first complete the prerequisite mission:

Complete Side Mission: A Traitor Within

This previous mission introduces you to the characters and sets up the storyline for The Mole's Gambit.

A Traitor Within mission location in Borderlands 4

After completing A Traitor Within, head to Carcadia and look for Levaine near the Electi tree to begin The Mole's Gambit.

Levaine location by Electi tree in Carcadia

Borderlands 4 The Mole's Gambit Complete Walkthrough

Follow this step-by-step guide to successfully complete The Mole's Gambit mission and sabotage Willem's operations.

Destroy Willem's Devices in Borderlands 4

Your first objective is to locate and destroy five of Willem's surveillance devices scattered around the area. All devices are marked on your map.

Device #1: Atop Stairs

First Willem device location atop stairs

The first device can be found atop a set of stairs in the central area.

Device #2: By a Stall

Second Willem device by a market stall

From the upper level, jump over the rail to find the second device by a stall.

Device #3: Shaded Corner

Third Willem device in a shaded corner

The third device is hidden behind some supplies in a shaded corner.

Device #4 & #5: Platform Area

Fourth and fifth Willem devices on platform

The fourth device is on top of a platform, while the fifth is nearby at the top of some stairs.

Pro Tip:

All devices can be destroyed with a single melee hit. Use a character with melee bonuses for quicker completion.

Finding EMP Parts in The Marrow Narrows

After destroying Willem's devices, head to The Marrow Narrows to locate three EMP parts needed for your mission.

Clear the Area First

Ripper enemies in The Marrow Narrows

Eliminate all Ripper enemies in the area before searching for parts to avoid interruptions.

EMP Part 1: Trash Pile

First EMP part by trash pile

Follow the path deeper into the ripper camp to find the first part by a pile of trash.

EMP Part 2: Wall Mount

Second EMP part stuck to a wall

Climb the roofs above the first EMP part to find the second one stuck to a wall.

EMP Part 3: High Platform

Third EMP part on high platform

The third part is on a high platform reachable by jumping on containers.

Breaching the Order Depot in Borderlands 4

With all EMP parts collected, it's time to breach the Order depot and confront Willem.

Step 1: Find the Order Convoy

Order convoy at Grindstone of the Worthy

Head to the Grindstone of the Worthy to locate the Order convoy. Eliminate all Order guards in the area.

Step 2: Hack the Convoy Signal

Hacking the convoy signal on truck

Approach the main truck and hack the convoy signal to gain access to the depot location.

Step 3: Breach the Depot

Order depot east of Grindstone of the Worthy

Travel east of the Grindstone of the Worthy to find the Order depot and breach its defenses.

Step 4: Assemble the EMP

Assembling EMP on upper floor

Climb to the upper floor of the depot and assemble the EMP at the center of the room.

Step 5: Defend During Charging

Defending against Order forces during EMP charge

Hold off Order forces for 1 minute and 31 seconds while the EMP charges. Find strategic cover points.

Step 6: Confront and Defeat Willem

Boss fight against Leader Willem

Proceed to the marked location and drop down into the boss arena. Use corrosive weapons against Willem's armor.

Step 7: Return to Levaine

Returning to Levaine to complete mission

After defeating Willem, return to Levaine at Carcadia to complete the mission and claim your rewards.

The Mole's Gambit Mission Rewards

Base Rewards

  • Generous Cash Reward
  • Substantial XP
  • Eridium

Equipment Reward

SMG reward from The Mole's Gambit mission

High-quality SMG (Blue to Purple Rarity)

Excellent for close to mid-range combat with high fire rate

Cosmetic Reward

Vault Hunter Head cosmetic Cursed to Live

Vault Hunter Head: "Cursed to Live"

A unique cosmetic item for your character