Aliens will raid your bases. The loss of the base means the loss
of everything based on it. So what can you do to prevent the
destruction of your base? Several things besides 3.3.1.

3.4.1 Build defenses
days cost upkeep def accuracy
Missile Defense 24? 600k? 8k? 500? 50%?
Laser Defense 24 900k 10k 600 60%
Plasma Defense 36 1200k 12k 900 70%
Fusion Defense 36 1800k 14k 1200 80%

In addition, there's two more facilities that helps in Defense

Grav Shield 38 2300k 15k Gives another chance of hitting
Mind Shield 33 1300k 5k "Cloaks" base from alien scout

[CGW] Your base defense rating should be over 2500 to
consistently repel alien attacks.

[KSC] I recommend over 3500, PLUS grav shields, if you don't like
fighting inside your own base. Three fusion ball defense is
enough. Over course of a month, I allowed alien battleships to
attack my main base, which has the above. In ten tries, only ONE
battleship made it through my defenses (somehow four out of six
shots missed). Only eight Ethereals and one Sectopod made it
down against 10 hovertanks (2 of them Fusion Ball launchers).
The rest is history...

[Doug] Fighting inside your own bases is not that bad... Just
make sure you did not clog up the 80 items list with useless
... Далее >>