The following is a list of some secret commands to say into the headset:

"Hands up, get down" (sneak up to guards and yell it).

"Breech, Bang, Clear" (clear a room by pointing crosshairs into it - your team will throw in two bang, grenades, and a frag).

"Team low profile" (team sneaks around killing terrorists stealthy).

"Don't ask don't tell" (team not very helpful and dumber than usual).

"Get down" or "Hands up" (used to get enemies to surrender).

"Bravo open door."

"Bravo diffuse bomb" (when pointing crosshairs at bomb).

"Bravo kill me" (They will kill you).

"Bravo open/close door" (when close to a door -- point at it with the crosshairs).

"Bravo report status" (They will tell you what they are doing).

"I got a gun! What do you got?"

If Spectre or Jester is carrying a sniper rifle, you can use the command "Bravo Snipe".

There is a headset command that you do not see in the list, "Bravo/team snipe". It requires that you selecte one snipe rifle for both (A and B) at least, and that you are pointing your crosshairs on the enemy you want to snipe. The game will give you this as an "attack to", but the attack is by sniping (even if the other teammates have a simple rifle). This does not always work.