Open the command window by pressing the key between ; and #.
|loaded||all guns/weapons and 999 ammo|
|playersonly||freeze (type again to undo)|
|killbots||kill bots( (may be irreversible during that map)|
|ghost||ghost i think|
|fly||no need to jump you can fly!!!|
|walk||changes you back from fly|
|teleport||teleport to crosshairs|