Double Extraction is a single player mission built using the Call of Duty 4 mod tools.The level where Double Extraction takes place is from the Call of Duty 4 mission Blackout that comes with the Mod Tools.

To make Double Extraction the Blackout mission assets were completely stripped of pre-existing gameplay elements. Many art changes were then made to the Blackout level in order to facilitate the new gameplay. Much of the play area in Double Extraction was not actually traversable in Call of Duty 4. Because of this a significant amount of lighting, geometry editing and prefab staging had to occur. All of this was done with visuals in mind.

All gameplay and cinematics were scripted from scratch using existing Call of Duty assets and script functions for shooting, linking objects, spawning hud elements, pathing AI, etc. In the end this amounted to about 4000 lines of script. All voice over in the mission is self recorded minus the last line from the helicopter pilot.

Double Extraction went through multiple rounds of iteration driven by playtesting. I urge you to play it more than just once. Try obeying orders and try disobeying. Look for alternate paths and even try and break the mission. Much effort was put into making the Double Extraction absolutely solid and at the same time flexible. To give it a try yourself hit up the download links above and follow the readme’s install instructions. Though I recommend playing it first you can see a video of the gameplay in the demo reel section.