The way the Ratchet & Clank wiki capitalizes words has changed; therefore, this article should be checked, and, if necessary, capitalization should be fixed.
Grav-Trains (short for gravity trains) were large, hovering freight trains which flew through the city of Metropolis on planet Kerwan. They often carried luggage and crates and were commonly used by Gadgetron Corporation.
- Ratchet & Clank (first appearance)
- Ratchet & Clank: Up Your Arsenal
- Ratchet & Clank: Into the Nexus
- Ratchet & Clank (PS4) (re-imagined Grav-Train)