Movement
WASD - move
Left Shift + W - run
Space - jump
Q/E - lean
C - crouch
Weapons
Left Mouse Button - shoot
Right Mouse Button - Aim
1 - primary weapon
2 - secondary weapon
3 - a melee weapon
4 - lethal item
5 - non-lethal item
Killstreaks
6 - airstrike (unlocked at 10 kills without death)
7 - helicopter (unlocked at 8 kills without death)
Others
Enter - chat
Tab - scoreboard
Escape/M - pause menu
F - Open/Close doors