Missile Launcher

Technical details
Rocket launcher is both cheap and very simple defense mechanism.

Needing

 * Metal: 2'000
 * Shipyard: level 1

Rapidfire Malus

 * Rapidfire from Cruiser: 10
 * Rapidfire from Planet Bomber: 20

Notice: As needing only Metal, this is better to create them massively instead of stopping producing Metal. Also possible to remove remaining Metal a planet before attacked, to invest massive number ML to put Metal near zero. All the same cancel it after attack (you recover only half).

Table details + sample bonus Upgraded value depending your bonus from Academy and Researches