Call of Duty

How to Get the Warzone Protocol Access Key

If you wish to get creative in how to kill zombies, follow this guide to have the tools to unlock a Bombardment.
If you wish to get creative in how to kill zombies, follow this guide to have the tools to unlock a Bombardment. / Courtesy of Activision.

Getting the Warzone Protocol Access Key is the first step to using Bombardment kill streak. This unassuming item is vital to unlocking one of the most powerful streaks in the game.

How To Get the Warzone Protocol Access Key

The first step to getting the Warzone Protocol Access Key is to find an area overrun by zombies. Whether you choose to go to the Shipwreck or Prison, any outbreak zone will do. After that, you will have to activate the Zombie Machine.

By this step, it is worth noting that according to the recent Warzone Containment Protocol alert, Yellow Access Cards are found on the uniforms of zombies. Now, you might wonder what use yellow cards have, but after you kill 40 zombies you will have to pick up a Yellow Access Card from the last corpse you kill.

With the Yellow Access Card, you will be able to open a supply box marked on your map.

Head to the box and open it up to find your Protocol Access Key, giving you the ability to call in the Bombardment streak.