Ice Missiles are an upgrade to Samus's reliable Missile. As a direct enhancement to the regular concussive Missiles, Ice Missiles not only deal damage through an explosion, but also slows enemies down or immobilizes them completely by freezing them. Some enemies, such as Metroids, are more susceptible to the freezing effect than others.
Ice Missiles first appeared in Metroid Fusion as an alternative to the Ice Beam, as the Federation was afraid that Samus would reject the Ice Beam upgrade because of the Metroid DNA spliced into her genes. Samus obtains the Ice Missiles in a Data Room in Sector 5 (ARC). Ice Missiles can freeze enemies and living things. Like enemies frozen through her former Ice Beam, Samus can then use frozen enemies as stepping stones to reach otherwise unreachable heights.
Metroid Prime 3: Corruption
In Metroid Prime 3: Corruption, they are obtained after defeating Rundas in the Temple of Bryyo on Bryyo. They can freeze enemies and Fuel Gel. They serve as a replacement to the Ice Beam, like Echoes' Dark Beam. Though the reason for using Missiles instead of a beam is never explained, it is likely due to Samus's inability to change beam weapons and with one of the beams being a heat-based weapon, Samus would be incapable of freezing foes. Ice Missiles can destroy White Blast Shields blocking access to doors.
- If a Reptilicus throws its boomerang at Samus and she freezes the creature before the boomerang gets back to it, the boomerang will shatter the reptile and Samus will receive a Friend Voucher and "Icy Repltilicide" will appear on the screen.