Same game. Two places.
Your controller, your friend, your PS2 co-op games.
Host a game
Start your game in PCSX2 first. Select its window when your browser asks what to share.
Saved passwords are protected by Windows. Uncheck and save to forget the password. The service URL and controller slot are always saved.
For many four-player games with multitap on port 1, choose 1B for the second player. Player order depends on the game. Enable the matching multitap in PCSX2 before hosting.
Join your friend
Connect your controller and press a button to make it visible to the browser.
On Android, use landscape and Full screen for more room. Touch controls replace the connected gamepad while enabled.
Standard browser gamepads map automatically.
Controller mapping / unsupported gamepad
Standard controllers work automatically. For other controllers, choose the browser button and axis indices, then save this profile on your device. −1 means unused.
Bring your controller.
Open the private invite link your friend sends you. Hosts start a session from PCSX2 → Tools → Browser Co-op.