Gold is the primary resource used to purchase units each turn. Nearly every unit in the game has a gold cost.
Any Gold not spent is stored at the end of a turn.
Gold generating units
The primary means of generating gold is through various types of units - primarily drones.
The basic drone
Part of the basic set, this drone is the primary means of generating gold. Each turn, it generates 1 by using its 
click ability.
Other drones and gold-producing units
