The extractor is the standard building for generating credits, which are used to buy any- and everything in the game. They can be built on resource pools only, and are upgradeable to increase their income and health.

Economically, it is always advisable to build and upgrade your Extractors first before looking to build a Fabricator since Extractors are far more effective than Fabricators. However, since they require to be built on resource pools, they are usually located in places closer to the enemy, so it is important to protect these locations from enemy attack.

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