Xbox 360 Controller: L3 Is Left Stick Click

No dedicated L3 button exists. L3 = pressing down the left analog stick until it clicks.

Full Button Map

• Left Stick: Move / Click = L3
• Right Stick: Camera / Click = R3
• D-pad: Up/Down/Left/Right
• A/B/X/Y: Face buttons
• LB/RB: Left/Right Bumpers
• LT/RT: Left/Right Triggers (analog)
• Back/Start: View/Menu
• Guide: Xbox button (center)

Games prompting "L3" mean: press the left stick down firmly until you feel/hear a click.