At Headquarter level 15 you unlock the Weapon Lab. With it you can make powerful prototype defenses out of Prototype Modules captured from the Blackguard.
All Prototype Defenses are fragile experiments, which is why they self-destruct after 7 days. Each Prototype Defense has 3 upgrade levels.
These are the Prototypes you can build:
Shock Blaster
The Shock Blaster shoots shock bullets at a high rate of fire, dealing heavy damage and stunning the target. With its fast firing rate, long range, no blind spot, and high damage per second it is a great all-around weapon.
Unlocks at Weapon Lab Level 1.
Lazor Beam
The beams of this Prototype burn through any target, causing moderate damage to all enemies in its path. The Lazor Beam will sweep through enemy troops in its sights making it ideal to deal with large groups of troops such as Heavies and Zookas.
Unlocks at Weapon Lab Level 1.
Doom Cannon
The Doom Cannon shoots a Doom Ray that destroys most targets outright. It has a very high damage per shot but a very slow rate of fire. It has a small area of effect, doing damage to troops nearby its primary target. The Doom Cannon is very effective in damaging high-health troops like Tanks and Scorchers.
Unlocks at Weapon Lab Level 1.
Damage Amplifier
This Prototype amplifies the damage output of all nearby defenses using a high voltage hyperbolic gauss overdrive field. It is a Defensive Building that acts like a Damage statue with limited range of influence over other Defensive Buildings nearby. It boosts the damage of the affected defenses, doesn’t multiply it.
Unlocks at Weapon Lab Level 1.
Shield Generator
The Shield Generator generates a force field around the Headquarters, protecting it from damage. If the generator is destroyed, the shield dissipates. The placement of the Generator is important; an undefended Shield Generator can be easily picked off by any troop, wasting the shield around the Headquarters.
Unlocks at Weapon Lab Level 1.
Grappler
The Grappler shoots a grappling hook that pulls a single enemy unit close. It has an extremely long range and although it does very little damage it can pull any attacking unit next to itself. If placed well, the attacking unit will be pulled directly into the line of fire of other defenses. Its weakness is its slow rate of fire, which you can improve by upgrading it.
Unlocks at Weapon Lab Level 1.
Hot Pot
The Hot Pot is like a more powerful Flamethrower, but with improved reach. It stays protected in an underground bunker until enemies are in range. It’s the only defense that cannot be targeted by the Gunboat or Troops before it starts firing. When it emerges, there is a short delay before it starts firing. If it doesn’t have any targets for a few moments it goes back into hiding.
Unlocks at Weapon Lab Level 2.