How Many Call of Duty: Modern Warfare Games Exist? Two Eras, Six Total

There are two distinct "Modern Warfare" eras:

Original Trilogy (2007–2011)

1. Call of Duty 4: Modern Warfare (2007)
2. Call of Duty: Modern Warfare 2 (2009)
3. Call of Duty: Modern Warfare 3 (2011)

Reboot Duology (2019–2023)

1. Call of Duty: Modern Warfare (2019)
2. Call of Duty: Modern Warfare II (2022)
3. Call of Duty: Modern Warfare III (2023) – Direct sequel to 2022.

Total: 6 main games (3 original + 3 reboot). Campaigns are separate continuities.