Ratchet & Clank: Going Commando, known as Ratchet & Clank 2: Locked and Loaded in Australia and most PAL countries, is a 2003 third-person shooter platform video game developed by Insomniac Games and published by Sony Computer Entertainment for the PlayStation 2. It is the second game in the Ratchet & Clank series, following Ratchet & Clank. 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 in a new galaxy involving 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 from a third-person perspective. The player progresses through the story by using various weapons and gadgets to defeat enemies and solve puzzles, while exploring planets, completing platforming sections and minigames. The game features many improvements over the original game, such as the aesthetics and introduces many new gameplay aspects, such as weapon upgrading.

Going Commando was released roughly a year after the original game and received critical acclaim. It has frequently been listed as one of the best PlayStation 2 games. Most critics felt that the game was superior to its predecessor and praised the game's graphics, gameplay, story, characterization and sound. Some criticized its unforgiving difficulty and minigames. It was followed by Ratchet & Clank: Up Your Arsenal.