Strategy
Defense 4 plays in the same style as the previous
game. However this time you are in control of
THREE castles, and you must position your troops
as to which castle you'd like them to come from.
Every 45 seconds you will be given better "new"
troops. Defeat the enemies castles, and protect
your own. You can set the number of troops available
on screen in the options menu, as well as how
often "new" troops become available
to you.
Select which
castle you'd like to train troops from by pressing
the Z, X and C keys. You should see a blue box
appear next to the castle you've chosen. Left
mouse click to select the type of troop tower
you want from the menu at the bottom, if you
pick a tower you have to left click on the spot
you'd like to put it (available spots become
highlighted).