Can You Play Call of Duty Online on PS2?

No. No Call of Duty title on PlayStation 2 supports online multiplayer.

What Multiplayer Exists?

• Local split-screen (2 players) in most titles.
• System Link (LAN) via Ethernet cable or router for 2–16 players (game-dependent).

Why No Online?

The PS2's online infrastructure (DNAS) was limited, and Activision prioritized online for Xbox (Xbox Live) and later PS3/Xbox 360.

To Play CoD Online Today

You need a PS3, PS4, PS5, Xbox 360/One/Series, or PC. Modern Warfare (2019), Black Ops 6, and Warzone are current online entries.