Fortification

Naval Fortification

Medium Mine

Heavy Mine

Heavy Mine, Naval Series

Light Anti-air Tower. Transportable (Heavy)

Light Laser Tower. Transportable (Heavy)

Floating Anti-air Tower

Light Plasma Defense

Offshore Torpedo Launcher

Beam Laser Turret. Transportable (Heavy)

Coastal Torpedo Launcher

Pop-up Lightning Turret

Pop-Up Missile Battery

Heavy Laser Tower

Floating Heavy Laser Tower

Floating Anti-Air Missile Battery

Bomb-Resistant Medium-Range Anti-Air Missile Battery

Floating Rapid-fire Plasma Tower

Medium Plasma Artillery

Advanced Fortification

Pop-up Gauss Cannon

Intrusion Countermeasure System - tracks down stealthy units

Anti-Air Flak Gun

Anti-Air Flak Gun - Naval Series

Advanced Torpedo Launcher

Anti-Nuke System

EMP Missile Launcher

Long Range Anti-Air Tower

Cloakable Pop-up Plasma Artillery

Plasma Deflector

Tachyon Accelerator

Floating Plasma Deflector

Long Range Plasma Cannon

Rapid-Fire Long-Range Plasma Cannon