Getting to the Moon would grant special alien bonuses, but nothing that is entirely OP. Also, you would eventually be able to turn a settler into a Sentiman, a unit that gives fantastic battle bonuses to the nearest X combat units (replace X with a number). The Sentiman also has the ability to control a few of the other team’s troops. After the battle, these troops can then be placed into labor/prison, or the Sentiman can order them to go behead themselves or whatever Goblins like to do for “honorable death”. Anyways, that’s not the only thing that would be special, and there are more things to come!
PS- Getting to the Moon doesn’t grant bonuses, but finding artifacts on the Moon does.