GTA 3 Browser Fullscreen Guide: Mouse Lock, Escape Key and Best Display Setup

Fullscreen and pointer lock differ

Fullscreen controls how much of the display the game occupies. Pointer lock controls whether mouse movement is captured for camera input. They often happen together, but they are separate browser APIs.

Starting fullscreen play

Play Game opens the dedicated game window. If native fullscreen is not granted automatically, use the visible Fullscreen control. Browsers require fullscreen to be triggered by a user gesture, so a page cannot safely force it at arbitrary times.

Mouse capture

Click inside the canvas to focus the game. Pointer lock can then route relative mouse movement to the game. Press Escape to release the cursor. If mouse look feels stuck, click the canvas again.

Display scaling

The launcher resizes the canvas when fullscreen changes. Very high display resolutions increase WebGL workload, so a 4K fullscreen view can be more demanding than a 1080p window even when game logic is identical.

Mobile orientation

Touch play is best in landscape because GTA III uses a wide 3D view and multiple simultaneous controls. The site already stores AUTO, ON or OFF as the touch-control preference for future on-screen controls.

Troubleshooting fullscreen

If fullscreen fails, check browser permissions and retry from the button. If the canvas size looks wrong after entering or leaving fullscreen, resize the browser once or re-enter fullscreen so the resize handler runs again.