Control

Control is a zerg gameplay counter limiting the size of a zerg force. Every constructed unit requires control, and more control can be generated by spawning overlords, up to a maximum value of 200. New units can be produced so long as the cumulative control of all active units does not exceed the number of available control.

In strategy discussions, control levels may be denoted as x/y, where x is the control used, and y is the total available control. Unit costs may be denoted as x/y/z, where x is the cost in minerals, y is the cost in gas, and z is how much control is used.

Terran supply and protoss psi serve the same purpose.

StarCraft

Producers

	Building/Unit
1	Hatchery Lair Hive
8	Overlord
30	Yggdrasill

Consumers

	Building/Unit
0	Larva Overlord Broodling
½	Zergling Scourge
1	Drone Hydralisk Infested terran
2	Lurker Defiler Mutalisk Guardian Devourer Queen
4	Ultralisk

StarCraft II

Producers

	Building/Unit
2	Hatchery (WoL/HotS) Lair (WoL/HotS) Hive (WoL/HotS)
6	Hatchery (LotV) Lair (LotV) Hive (LotV)
8	Overlord Overseer Niadra (small)
12	Overlord (Improved Overlords in HotS campaign)
15	Niadra (medium)
30	Niadra (large)

Consumers

	Building/Unit
0	Larva Overlord Overseer Broodling Infested terran Changeling Locust
½	Zergling Baneling Drone (Twin Drones upgrade in HotS campaign and Zagara in Co-op Missions)
1	Drone
2	Queen Roach Corruptor Mutalisk Infestor Hydralisk Brood queen Brutalisk (Abathur in Co-op Missions) Devourer Guardian Infested medic Leviathan (Abathur in Co-op Missions) Swarm queen
3	Ravager Swarm host Viper Lurker Aberration Impaler Infested diamondback Infested liberator Infested siege tank
4	Brood lord
6	Ultralisk