Ratchet & Clank 2: Going Commando is a 2003 3D platform video game developed by Insomniac Games and published by Sony Computer Entertainment for the PlayStation 2. Ratchet & Clank: Going Commando is the second game in the Ratchet & Clank franchise, following Ratchet & Clank and preceding Ratchet & Clank: Up Your Arsenal. David Kaye reprises his role as Clank while James Arnold Taylor replaces Mikey Kelley as Ratchet.

The game follows Ratchet and Clank, joined by newcomer Angela Cross, as they attempt to unravel a conspiracy behind a mysterious "pet project," orchestrated by the shadowy MegaCorp.

The gameplay of Going Commando is similar to that of the original Ratchet & Clank. The player controlled protagonists are seen in a third-person perspective; the player uses various weapons and gadgets to defeat enemies and solve puzzles, while exploring planets, completing platforming sections and minigames, and progressing through the story. The game features many improvements over the original game, such as the aesthetics and introduces many new gameplay aspects, such as weapon upgrading.