How to get the achievement: Explore the Floor in Halo 4. In the mission select, choose Composer: Rally Point Delta. The goal of this achievement is to get one of the two hunters that block your path to fall to it's death. This can be accomplished by standing on the edge of the platform and provoking the hunters into a meleeing animation. When they do jetpack over it's head so it's momentum will carry it over the edge. 20 Gamer Score.