Barrier - Employs a shield to protect your cannon (s) from attack.
20,000 Points
Laser - Lets you fire a penetration laser from your cannon(s). 15,000
Points
Rapid - Gives your cannon(s) rapid-fire capabilities. 5,000 Points
Speed Up - Increases the speed at which your cannon(s) fire. 2,000
Points
Stop - Temporarily freezes the invaders. 30,000 Points
Support - Support cannons appear and shoot together with your main
cannon. 10,000 Points