## In-game look
In-game look
## How to Unlock Litmus
How to Unlock LitmusUnlocked by killing 1500 Operators during the MW4: Beta.
CoverageWhere it appliesModeMultiplayerWeaponsAcross the rosterStatusLimited-timeLitmus is a special camo for Multiplayer. It typically applies across the weapon roster once unlocked.
Litmus notesLitmus is the Open Beta event camo: unlock it by getting 1,500 operator kills during the MW4 Beta. That is a live, countable challenge — not a DMZ mastery stub and not a pre-order bonus.It is the camo you can actually finish this weekend if you play enough. 1,500 kills is a lot of Gunfight and moshpit, not a casual afternoon. Track it in the in-game challenge menu; this page is the lookup, not a live counter.Compared with Moonlit Pearl, Litmus is earned in matches. Compared with Gilded Ruin, it is a beta event, not the Skulls collection. If the beta ends before you hit 1,500, assume the window closed unless Infinity Ward extends it.Rate Litmus after you have seen it on a gun you actually use. Event camos are collected for the grind story as much as the look.
## Related Content
Related ContentGilded RuinSpecial · LegendaryMoonlit PearlSpecialEmpyrosMasteryMercurial DriftMastery · RareOrion ReforgedMastery · RarePolyatomic ReforgedMastery · Rare
Source: Archive source notes. This is an independent Call of Duty: Modern Warfare 4 reference page.