by july 2006, "ratchet & clank" had sold 1.1 million copies and earned $31 million in the united states. "next generation" ranked it as the 49th highest-selling game launched for the playstation 2, xbox or gamecube between january 2000 and july 2006 in that country. combined sales of the "ratchet & clank" series reached 4 million units in the united states by july 2006.