Control schemes

Original Xbox Controller (Default Controls)

Xbox Controller

Halo: Combat Evolved

A - Jump
B - Melee attack
X - Reload weapon/Action
Y - Switch weapons
Left Analog - Movement
Left Analog Click - Crouch
Right Analog - Camera
Right Analog Click - Zoom
Right Trigger - Fire weapon
Left Trigger - Throw grenade
"Back" Button - Go back/Multiplayer score
"Start" Button - Pause
Directional Pad - Menu Movement
Directional Pad Up - Teamspeak
Black Button - Switch grenades
White Button - Flashlight/Teamspeak

Halo 2

A - Jump
B - Melee attack
X - Reload weapon/Swap weapon/Action
Y - Switch weapons
Left Analog - Movement
Left Analog Click - Crouch
Right Analog - Camera
Right Analog Click - Zoom
Right Trigger - Fire weapon
Left Trigger - Throw grenade/Fire secondary weapon/E-brake/Boost
"Back" Button - Go back/Multiplayer score
"Start" Button - Pause
Directional Pad - Menu Movement
Directional Pad Up - Teamspeak
Directional Pad Down - Lower weapon
Black Button - Switch grenades
White Button - Flashlight/Teamspeak

Xbox 360 Controller (Default Controls)

Xbox 360 controller

Halo: Combat Evolved

A - Jump
B - Melee attack
X - Reload weapon/Action
Y - Switch weapons
Left Analog - Movement
Left Analog Click - Crouch
Right Analog - Camera
Right Analog Click - Zoom
Right Trigger - Fire weapon
Left Trigger - Throw grenade
"Back" Button - Go back/Multiplayer score
"Start" Button - Pause
Directional Pad - Menu Movement
Directional Pad Up - Teamspeak
Right Bumper - Switch grenades
Left Bumper - Flashlight/Teamspeak

Halo 2

A - Jump
B - Melee attack
X - Reload weapon/Swap weapon/Action
Y - Switch weapons
Left Analog Stick - Movement
Push Left Analog Stick - Crouch
Right Analog Stick - Camera
Push Right Analog Stick - Zoom
Right Trigger - Fire weapon
Left Trigger - Throw grenade/Fire secondary weapon/E-brake/Boost
"Back" Button - Go back/Multiplayer score
"Start" Button - Pause
Directional Pad - Menu Movement
Directional Pad Up - Teamspeak
Directional Pad Down - Lower weapon
Right Bumper - Switch grenades
Left Bumper - Flashlight/Teamspeak

Halo 3 Beta Controls

A - Jump
B - Melee attack
X - Deploy Equipment
Y - Switch weapons
Left Analog - Movement
Left Analog Click - Crouch
Right Analog - Camera
Right Analog Click - Zoom
Right Trigger - Fire weapon
Left Trigger - Throw grenade/Fire secondary weapon/
Directional Pad - Push to talk
Right Bumper - Switch grenades
Left Bumper - Reload/Switch grenades