The High Impact Games Treehouse, was the name of a secret level in Ratchet & Clank: Size Matters and Secret Agent Clank. In both games, certain conditions had to be met to unlock this level. This level contained things that did not make into the final game, including never used characters and weapons, concept art, Easter Eggs, secret codes and more. Although in both the games the level had the same name, concept and was also a secret level, the two differed from a different look and of course, content. The purpose of the treehouse was similar of that of the Insomniac Museum in Ratchet & Clank: Going Commando, Ratchet & Clank: Up Your Arsenal and Ratchet & Clank Future: A Crack in Time.