COD4 Survival Mode Prototype is an experimental mode for Call of Duty 4 Singleplayer that aims to simulate Modern Warfare 3 Survival Mode mechanics on Call of Duty 4. The initial purpose of the mod is to create a basic Survival mode like MW3 with Call of Duty 4 assets in Singleplayer. This means that in the first version of the mode, it will only have weapons, equipment and support items that are available in Call of Duty 4 singleplayer.