- "Alright I line it up, you guide it in."
- — Keegan to Logan just before destroying the Aegis-class combat ship with the Proteus Missile.
The Proteus Missile is a gadget that is featured in Call of Duty: Ghosts. It is used by Logan Walker in the mission "Into the Deep" to sink an enemy vessel. It launches a torpedo that is controlled by a second person.
- The HUD was originally different, having a simple targeting interface; in the final game, this was changed to a thermal-like HUD.
- The front of the Proteus Missile apparently features circular saws.