Posted: Aug 30, 2026 11:02pm UTC
As part of the MW4 Beta, you can unlock the exclusive Litmus Special Camo upon completing a special challenge, which is otherwise secret until you unlock it. This guide explains everything you need to know about unlocking the Litmus camo in Call of Duty: Modern Warfare 4.
How to Get the Secret Litmus Camo in the MW4 Beta
In order to unlock the beta exclusive Litmus Camo, you must perform 1,500 Operator Kills over the course of the MW4 Beta. While there is unfortunately no way to check your current kill count in-game, you can visit and sign into your Activision account via the MW4 Beta Stats page. Then, follow the on-screen prompts, and you'll soon receive a full breakdown of your beta stats.
Once you've reach 1,500 Operator Kills, navigate over to the Create a Class, hover over your chosen weapon, select "Appearance" then "Camo," and you'll have the ability to equip the Litmus Camo. If the Litmus Camo isn't available to you, despite reaching the requirements, you may need to wait a little while for the game to update.
Litmus Special Camo
Need help getting kills quickly in the MW4 Beta? See our handy guides for more details:
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Source: Archive source notes. This is an independent Call of Duty: Modern Warfare 4 reference page.