Can PSP and PS2 Play Multiplayer Together? No - Indirect Options Only

No direct multiplayer is possible between PSP and PS2. They use different hardware, OS, and network protocols.

Indirect Options

• Remote Play (PS3/PS4/PS5): Stream gameplay from those consoles to PSP over Wi-Fi. Does not work with PS2.
• Local PS2 Multiplayer: Some PS2 games support split-screen or LAN; PSP cannot join as a controller or second screen.

For cross-device play, you need a PS3, PS4, or PS5 with Remote Play.