A digital pocket detention we interact with through synthetic life forms to vent our desires or frustrations by remaking the world into what we see as satisfactory
A communist plot to subvert the American [free-world] youth by diverting time and attention from productive activities in suport of the state.
ALTERNATELY
A covert op by the Forces of Freedom™ to embue the younger generations of the world with skills in project planning, resource managememt, diplomacy [SMP], risk assessment and risk management. [Also to sneak in a bunch of arithmetic practice. :D]