That's No Sandstorm

That's No Sandstorm was a planned SP mission in Call of Duty 4: Modern Warfare. Not much is known about this level; the only proof of its existence is a file called "compass_map_sandstorm.iwi" present in the game's source files. In the mod tools, in the raw/english/localizedstrings folder, a file called "sandstorm.str" can be found. The string file includes information about the level, such as its location, the level name, the date, and various objectives.

Plot
From the level's planned string file, the mission would take place in the Omani-Saudi Arabian border. The player's team would be U.S. Marines on Border Security Operations. The mission would take place early in the game, as the date is "Day 1 - 1012 hrs".

Hint strings include the following: "Press USE to plant C4"; "Press USE to mount the 50cal machine gun"; "Press USE to take the LAW rocket". The latter mentions the "LAW rocket" which is most likely the M72 LAW anti-tank weapon. No such weapon is included in the final build of Call of Duty 4. Also implied is the ability to mount machine guns, which is also currently not possible in the game.

Objectives include the following: "Defend the patrol with the 50 cal"; "Defend the west perimeter"; "Defend the east perimeter"; "Find a LAW"; "Destroy the BMP Transport"; "Plant C4 on the base weapons caches"; "Protect base interior from being overrun"; "Locate transportation out of the base"; "Access the vehicle depot". The string "Destroy the BMP Transport" is included twice, meaning there would be two BMPs to destroy.