Below is from the Call of Duty Wiki: http://callofduty.wikia.com/wiki/Drop_Zone
Call of Duty: Infinite Warfare DROP ZONE
As with MW3 & Ghosts, two teams must fight over a moving location on the map (Hardpoint markers) to gain points. It differentiates itself from a similar game mode such as Hardpoint, however, with the addition of Drone Package as a reward for successfully holding on to the point. Approximately every 15 seconds a team holds a zone, a Drone Package will be called automatically on the drop zone. To win, either one team must reach the score limit, or else the victor is determined by who has the most points when time is up.
Each team member within the drop zone area adds 20 points per second to his team's score; this is cumulative with other team members for a possible maximum of 120 points/second. The first team to 750 points is the winner.
Each drop zone is marked by arrow markers, making it somewhat difficult to distinguish targets inside or outside of the area without using the Marksman perk. Usage of grenades/explosives is quite heavy among players. Therefore, the perks Blast Shield and Tac Resist, the Trophy System, and even Reactive Armor can be useful in countering the explosives.
Players cannot earn killstreaks or specialist perks that are selected on their classes, but De-Atomizer Strikes are still obtainable through kills with guns with the Nuclear gun perk.
In some instances, the location of the next drop zone can be predicted. Additionally, the drop zones will always rotate in cycles and once every drop zone has appeared for one minute, it will ALWAYS revert back the first, center one. It is worth noting that different maps have varying numbers of drop zone locations. The rotating locations in Terminal is always fixed in the same order, so it is strategic to shift locations in the last few seconds of the drop zone in order to take an early advantage.
It was first added into public match in the Featured playlist on January 20th, 2017. It was later re-added to the playlist from March 10th, 2017 to March 17th, 2017.
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