These are the default key bindings for Aliens: Colonial Marines. (A:CM)

You can change the commands in the Main Menu under "Controls"

PC Controls - Movement[edit]

Movement is the same for both Marine and Xenomorph

Command Key
MOVE FORWARD W
MOVE BACKWARDS S
STRAFE LEFT A
STRAFE RIGHT D
WALK ALT
SPRINT Left SHIFT Key (Hold)
JUMP SPACE BAR
TURN/LOOK Move Mouse

PC Controls - Marine[edit]

Button scheme is set to Soldier, and analog stick scheme to Default You can change or customize the control settings in the Settings Menu.

Command Key
PUSH TO TALK CTRL
TAUNT U
CROUCH C
PRIMARY FIRE LMB
SECONDARY FIRE F
MELEE ATTACK V
RELOAD R
ZOOM RMB (Hold)
ZOOM CYCLE Z
WEAPON SELECTION B
SELECT PRIMARY WEAPON 1
SELECT SECONDARY WEAPON 2
SELECT SIDEARM 3
EQUIP TACTICAL G
NEXT WEAPON Scroll Wheel
MOTION TRACKER Q
USE E
FLASHLIGHT X

PC Controls - Xenomorph[edit]

In Versus mode, you will also play as Xenomorphs. Button scheme is set to Warrior, and analog stick scheme to Default. Primary Attack, Secondary Attack, Use Ability and Fatality can be customised in Edit Loadouts in Versus mode.

Command Key
WALL CLIMB CTRL
AIMED LEAP F
USE E
PRIMARY ATTACK LMB
SECONDARY ATTACK RMB
USE ABILITY Q
HISS U
FATALITY V

PC Controls - Other[edit]

Command Key
PAUSE ESC
SCOREBOARD/OBJECTIVES TAB
TEAM CHAT Y
GLOBAL CHAT T