Complex sentence: The other mission has a multitudes of directives having to do with the Alien race known as the enigmas including: establish contact with the alien race, try to establish peaceful relations, define borders of the alien race, and determine strength of the alien race.
Split into simpler sentences: The other mission has a multitude of directives concerned with the Alien race known as the enigmas. These directives include: establish contact with the alien race, try to establish peaceful relations, define borders of the alien race, and determine strength of the alien race.