Ratchet & Clank Size Matters

The gameplay is packed with RPG-like experience system that allows the player to buy new mods, similar to Up Your Arsenal. Ratchet can also collect pieces of different armor sets. These can be worn and mixed at will, but full sets provide extra abilities. The game features platforming elements, hovercraft races, Giant Clank's space battles, and Clank's battle robot arenas.

Multiplayer is supported through Wi-Fi Ad Hoc or Infrastructure with 4 game modes: DeathMatch, Team DeathMatch, Capture the Flag, and Iron Lombox Challenge. In the Iron Lombox Challenge mode the players need to complete specific goals like loading cows into a giant meat truck or collecting power cells for the team.