Fifa Online, Best Massive Online Soccer Game.
The mouse option is ambitious, you can feel the 1st. person shooter experience in a soccer game for a while, and shoot the ball precisely in the spot that you want.
After starting you must create a manager, choose a league team and improve it by earning in game currency in different modes and using it in the Game Store. Its Addictive!
Also, after each match players will be rewarded randomly with a player contract item which allows a player to be signed for a certain amount of money, or a stats boost that can be equipped on players.
The manager and the signed players also have levels which increase with the XP gained after every match.