Upkeep refers to both the unit support a team has, and the support a specific unit uses. Maximum upkeep may be increased through the capture of additional Outposts, or by surviving another wave in Survival matches. Current used support is the sum total of the support required by all units the units a team has on a map at any one instant. Should maximum upkeep be less than that required to build a specific unit its icon will be greyed out and it will not be available until sufficient upkeep is regained.

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