CyberGrid: Tower defense

CyberGrid: Tower defense is a tower defense game in which you protect your HQ from enemies. You build towers and three types of resource-generating buildings, then repair damaged buildings using the repair button. If the HQ is destroyed, the game ends.

To build or repair a building, you need enough resources. Each building generates a different resource, and resource-generating buildings work faster when placed closer to a resource node, so placement matters.