How to Unlock a Free CRBR-S on Mauer der Toten in Black Ops Cold War Zombies

The latest round-based Zombies map, Mauer der Toten, is now available in Season Four Reloaded of Call of Duty: Black Ops Cold War Zombies. With this new map is the introduction of the latest Wonder Weapon to be added to your arsenal, the Conversion-Ready Binary Repeater, or CRBR-S for short.

The base variant of the CRBR-S can be obtained via the Mystery Box and Trials. The many variations of the CRBR-S have a chance to be dropped upon killing Zombies. If you're looking for a guaranteed way of obtaining the CRBR-S, look no further than the following quest.

CRBR-S Blueprint - Call of Duty: Black Ops Cold War Zombies

The base model for the Conversion-Ready Binary Repeater - Standard, including aerial "Copy-Cat" companion capable of matching weapon output with additional blast. Supports three weapon mod-kits, and customized with an artificial intelligence that supports three unique voices.

Free CRBR-S

Prerequisites

Obtain the Blacklight

While Klaus is Deployed, use the Klaus Remote Control in your Tactical Equipment slot to Command him to a Locker found in the Switch Control Room. Klaus will interact with the Locker where a Blacklight can be equipped to your weapon.

Locate the Safe Combination

A number ranging from 1 to 3 can be found within the following areas, toggle the Blacklight and locate the secondary number nearby. Each area has three potential locations for the secondary number to be found.

Note each of these numbers down and the corresponding hidden number, this is the Safe Combination.

Garment Factory

Service Passage

Doorway
Pipes
Electrical Box

Grocery Store

Obtain the Free CRBR-S

Navigate to Hotel Room 305 and interact with the Safe to attempt the Combination. Using the controls defined by the on-screen prompt, input the Safe Combination acquired in the previous step.

Once complete, the Safe will open, revealing a CRBR-S which can be obtained free of charge.

Mauer der Toten Guide

If you're not familiar with the Mauer der Toten experience in Black Ops Cold War Zombies, the aforementioned terminology and locations may be difficult for you to understand. Because of this, we highly recommend that new players refer to our Map Breakdown for Mauer der Toten; this will provide you with a map layout and a list of related guides for the map.

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Here's how to get a Conversion-Ready Binary Repeater on Mauer der Toten in Call of Duty: Black Ops Cold War Zombies.