The Weapon Lab unlocks at HQ level 15 and allows you to assemble powerful but unstable Defense Weapons. In order to create these weapons you need Prototype Modules.
You get those modules by
- Destroying Colonel Gearheart’s War Factory
- Successfully defending against Lt. Hammerman
- Sending your Submarine on missions
- Destroying opponents in your Archipelago
Note that the chance to find these Modules from normal battles is very small. So your troops will have to fight many battles to find theserare pieces.
Depending on the level of your Weapon Lab you can place either one or two weapons in your base at a time. Beware that the weapons won’t last forever! They will automatically destroy themselves after 7 days.