To be sincere at start i thinked the energy system was pure shi**, etc.. but then i started playing serious and confirmed it is a limitator, u play for some time, then log off.. i think is like a type of game u no play 24/7, but keep logged, do some missions, leave the page open / close.. log back later, do it again.. and keep growing.. i think if it was a game without energy system, would have people strongest as hell and others +- +- due no much time to play the game.. hope the game no die cuz of no much players who think this way.
Ho-dor.