|“||Our champion used a device that made moving through liquid like moving through air. The Ing have taken it. If you wish to explore Torvus freely, you will take it from them!||„|
—A-Voq, referring to the Gravity Boost.
The Gravity Boost is a Luminoth technology once used by A-Kul, the champion of Aether. Developed during the war, it negates the effect of liquid hindrance on its users. At some point the Ing stole this device and sealed it within the deepest part of Torvus' flooded temple. The Ing most likely took it after they killed A-Kul in the Sky Temple Grounds.
Samus Aran reclaimed the Gravity Boost power-up in Metroid Prime 2: Echoes. It helped Samus move through the water with ease and let her do a triple Space Jump underwater (it actually makes her float, but it does the same job.) It was located in Torvus Bog, at the Hydrochamber Storage Room. When Samus collected it, she had to fight the Alpha Blogg, which was the guardian of the item (presumably a trap left by the Ing to those who would steal from them).
The Gravity Boost has a similar effect to the Gravity Suit in other games in the series as liquids no longer hinder movement and visibility underwater is improved, but the Gravity Boost grants an additional third jump that allows Samus to further access specific areas underwater with it when possible. The Gravity Boost also functions in the waters of Dark Aether, however Samus will not sink into them without the Light Suit.
While just about to fight the Chykka at the Dark Torvus Temple, if Samus steps into the Dark Water around the larva's shell while firing the Seeker Launcher, for the rest of the battle Samus will have water physics, allowing use of the Gravity Boost, until Dark Water collides with her again.
"An attachment that clips snugly onto the back of Samus's Dark Suit, the Gravity Boost allows her to float in deep water."
- In one cutscene, after Quadraxis's head is destroyed, she used the Gravity Boost to jump away from the exploding head. This is contradictory to the fact that it is exclusively for underwater use.
- When Samus acquires the Light Suit, the Gravity Boost merges into her back leaving no visible trace, and she is still able to perform the ability. This is likely to demonstrate that, unlike the Dark Suit, the Light Suit was designed specifically for Samus by U-Mos - the "ultimate blend of Chozo and Luminoth technology".
- Metroid Prime: Federation Force features a similar ability in the playable Federation Marines. They are able to fly in midair with a booster, used to traverse large gaps.
|Power Suit movement systems|
|Thrusters||Screw Attack • Gravity Boost • Speed Booster • SenseMove|
|Boots||High Jump Boots • Space Jump • Jump Boots • Space Jump Boots|
|Morph Ball||Spring Ball • Spider Ball • Boost Ball|
|Arm Cannon||Grapple Beam|