Team Trooper Grey is a neutral team in team games. The members of this team do not appear on radar, and the rank icon is grey during team deathmatch. To activate this, press the triangle button (or any exit button like the B button) right before the loading screen appears, after everyone selects their character and team colour. If done correctly, your screen will have the character selection list in the background, but the loading will keep on going. The score board will not fully show Team Trooper Grey and their score, it will be stuck half seen and half not. On certain profiles this cannot be done.