Easymode to get As. Just finish all the levels, then go back with 3/3 Hyper Shot and full 10 Homing Missiles. Let go of little bursts of ammo when a wave starts. No wasted shots. Pick up any weapons upgrades as Dumbfire missiles, and dodge the Health/Energy/Shield pickups. When the boss comes around, pick up one bonus as a shield, sit on the boss and hammer it with hypershot. Pick up the second shield, rinse and repeat. As.
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