Left Click: Select in Main Menu/Throw Held Object/Primary Attack
W, A, S, D: Move
Space: Jump
Ctrl: Crouch
Shift: Sprint
E: Interact/Pick Up Object
F: Flashlight (if you have it)
H: Cover your mouth
F5: Quick Save
F9: Quick Load
M: Main Menu
P: Pause
Right Mouse Button: Secondary Weapon Upgrade
Middle Mouse Button: Tertiary Weapon Upgrade
V: noclip (If you get stuck on geometry or due to bugs etc)