Most of the characters and weapons in the game are named after other characters and weapons from Modern Warfare 2. The Ghosts are named after Modern Warfare 2 character Ghost and even have masks made after the mask Ghost wears. Riley the German shepherd is named after Ghost's real name (Simon Riley), and the honey badger assault rifle is named after an assault vehicle.
The game's open finale would set up a sequel. However as of 2021, no sequel has been announced.
The least selling game in the Call of Duty series.
Infinity Ward stated that Ghosts engine is powered by a new engine, but realized it is still the old engine that powered Modern Warfare 3, with significant upgrades applied
Some elements of this game are reused assets from Call of Duty: Future Warfare, a cancelled Neversoft game, which was going to be released instead of CoD Ghosts until it's cancellation.
Within those, we can find that the protagonist's name is Walker, and in CoD Ghosts the protagonist's last name is the same. Also the last mission of CoD Ghosts, is reused from a campaign mission from the canceled game, Like the sound of the Maverick rifle, which uses the same sound as the HERA-82 rifle, from CoD Future Warfare, and the space missions.