Scrin Structures in C&C3:TW

Buzzer Hive

As its name implies, this structure spawns Buzzers, killing any infantry that comes such. As such, this is a good anti-infantry structure.

Drone Platform

Scrin's equivalent of the Construction Yard. It allows construction of other structures.

Explorer

This serves as your primary unit for base expansion. It's built at the Drone Platform and allows you to build structures in the area of its deployment.

Extractor

This is the place where your Floating Gatherers unload the harvested Tiberium, converting it to valuable credits. An Extractor comes with one Floating Gatherer, but you can build additional ones. Note that this structure does all Tiberium storing, and there's no need for Tiberium silos.

Foundry

A new feature for C&C, this structure gives you an additional building queue, meaning that you can build and deploy multiple structures at the same time. It's relatively cheap comparing to the cost of a Drone Ship.

Gravity Stabiliser

This is the place where you build Scrin aircraft. You can build as many aircraft as you want, but up to four aircraft can land (and possibly reload and heal) at the time.

Growth Accelerator

This structure is always a good investment. When you place it in the center of a Tiberium field, it increases the growth rate of the surrounding Tiberium.

Nerve Center

The Nerve Center provides you with an overhead display of the map, and unlocks advanced powers such as the Tiberium Vibration Scan.

Photon Cannon

Another type of base defense that fires a photon beam when the enemy is within range. It is particularly useful against vehicles.

Plasma Missile Battery

This is Scrin's anti-aircraft defense structure that fires plasma missiles at a medium rate.

Portal

As you might guess, this structure is a portal from mothership to the battlefield, allowing troop transport. It's esentially Scrin's barracks, where infantry units are built. Note that, unlike GDI's Barracks, Scrin units cannot heal here.

Reactor

The Reactor gives you esential power for other structures. A power plant of sorts. It can be upgraded with the Fusion Core upgrade that provides twice the power.

Rift Generator

Scrin's superweapon that creates a rift in space-time over a target zone that sucks in enemy units and structures and warps them into orbit.

Stasis Chamber

A tech center that provides additional upgrades for infantry units, and unlocks more advanced infantry.

Storm Column

An advanced base defense structure. It can create an ion storm within its radius.

Tech Assembler

Another tech center building that allows the building of advanced units such as the Annihilator Tripod. Additionally, it provides advanced upgrades for other units.

Warp Sphere

It is similar to the Portal, but instead, it summons vehicles. Basically, Scrin's war factory.