Single or multiplayer mode - game sending gamedata on server anyway. The server needs to know, whether passed time for statistics updating (health, armor and other) or not, how many you money earned, experience. And admin maybe added in anti-cheat system so that now any changes in game are sent to the server. But it is possible to break in principle such system and it will be sent on the server of nothing. I am not sure that the administrator will deal - simply at you a bug with sending of data or you hacking game.