Call of Duty: Modern Warfare 4 brings Open Combat Missions back, but only for one portion of the game's Campaign. In the Stranded mission, players must gear up to take down the North Korean forces following their invasion of South Korea. To complete the Time to Crate Achievement, you must open a total of 26 Yellow Supply Crates, some of which require codes obtained by solving puzzles. Here is every Stranded puzzle code and Yellow Crate location in Modern Warfare 4.
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