Eminent Domain Achievement in Halo: The Master Chief Collection

The objective of this gametype is rather simple: control the different territories scattered around the map and hold them for until you reach the score requirement or until the time limit expires. Generally, there are three or four territories and you will need to control multiple in order to win.

All that is required is to fully control three different territories at once and hold them for thirty seconds. This can be obtained in a Custom Game by yourself, so load up the "3 Plots" game type on a small map like Warlord and when the match begins, grab all three plots of land. The achievement will unlock once thirty seconds have passed.