Ender and the relation to Halo

As far as I can tell, Ender's Game has an existing connection to the video game series Halo. There is the main character, Ender in this case, that is alone and isolated and has to deal with saving the planet Earth. In Halo, Master Chief also has to save the Earth from the Covenant, a species of aliens planning to take over the Earth and at an extent, the entire universe.
Furthermore, Ender relates to Master Chief because of the fact that they are very similar in how they act and think. Ender has the mind of a genius and so does Chief. Both of them were accepted into military projects at a very early age. That makes them partially isolated with the rest of the world.
Unlike Ender, Chief is genetically enhanced. He has lived through so much torture and isolation. Chief is the main Spartan of just about every mission he takes part of until the rest of his "family" is killed off. He is the remaining Spartan left alive from the original batch of Spartans.
Ender is the Third Child of the Wiggin family. Thirds are supposed to be the best children out there. Ender does show that capability.
Ender has wits and genius, Chief has luck. More to come soon! Bye for now!