You guys forgot RF missiles.

a) DualMissile - Fires two missles at once; hold down to shoot the missles faster. Must press shoot button multiple times in order to shoot multiple times.
b) TriMissile - Fires three missles at once; hold down to shoot the missiles faster. Must press shoot button multiple times in order to shoot multiple times.
c) SiMissile - Fires one missile at a time. Can be used if you are low on ammo.

d) Green Missiles - Low damage
e) Red Missiles - High damage
f) Blue Missiles - High damage, multiple explosions; useful for taking out huge amounts of enemies at once

g) Guider - All missiles have a special upgrade chip area, where one can attach a chip that can enhance a missile. These (pack of 10) turn missiles into guided missiles, only works if enemy is within a certain range.
h) Fuel Saver - All missiles have a special upgrade chip area, where one can attach a chip that can enhance a missile. These (pack of 12) make missiles use less fuel, when they're closer to the ground, making them go faster.

Also, will you make better graphics when you're done? :P