Alien Swarm/Controls

Movement

Key/Button	Action
W	Move north
S	Move south
A	Move west
D	Move east
Spacebar	Roll
Shift (hold)	Walk (Move Slowly)

Combat

Key/Button	Action
	Primary attack
or  F	Secondary attack
1	Use offhand item (welder, flares, etc.)
	Melee attack
Q  or	Switch weapon
R	Reload weapon
G	Drop current weapon
E	Use/Interact (buttons, computers, etc.)

Communication

Key/Button	Action
C	Use voice communication
T  or  Y	Chat message
Z	Communications Menu
F8	Player list/Vote panel
TAB	In-game map
F5	Vote Yes
F6	Vote No

Squad

Key/Button	Action
2 ,  3 ,  4	Use Squad Equipment 2-4
X	Order hold position
V	Order follow
F1 ,  F2 ,  F3 ,  F4	Select marine 1-4

Miscellaneous

Key/Button	Action
F9	Take screenshot
Pause	Pause game
`	Toggle console