As legal organ of the Interplanetary Confederation,
the Galactic Assembly unites representatives of all know intelligent life-forms
inhabiting our universe;
at least, all those that have mastered their technology and
harbored the destructive forces thereof.
The main task of the Galactic Assembly is to decide on the admittance of
civilizations on the brink of deep-space travel to the Interplanetary Confederation.
The Assembly can choose to admit a civilization,
or, if it judges a civilization a treath to interstellar peace,
to employ every means necessary to prevent the dangerous species from travelling to outer space
before they are mature enough to do so.
Since a number of decennia, they have been observing Earth...
Earth is on probation.
One of the criteria for admittance to the Confederation,
is the behavior of individuals of the species under scrutiny.
That's why the Galactic Assembly has picked some average humans, the players,
and made them Galactic Messengers (MeGa = Messager Galactique).
They are employed in a number of troubleshooting jobs throughout the galaxy,
and their behavior is judged.