Primate

Primate is an achievement in Halo: The Master Chief Collection. This achievement is obtained when a player finds any of the three different "missing links" on the level Sierra 117. This can either be:


 * the missing link found at one of the threes at the other side of the river, when first encountering it.
 * The group of three Cavemen.
 * The single caveman at the end of the level.