Ammo Kinds

There are currently 4 ammo types. Their effects are different with each other. Ammo damage can be reduced by boosting stat points.
In Robofight, each weapon does a pre-defined damage type. They have different properties.
 * Physical: Does physical damage on target. Physical damage can be resisted by Strength stat point.
 * Physical/Projectile: Does multiple physical damage at the same time on target.
 * Optical: Does optical damage on target. Optical damage can be resisted by Dexterity stat point.
 * Magnetic: Does Electrical damage on target. Magnetic damage can be resisted by Intelligence stat point.