Well i no a few. in metropolis, shoot the fitness course quark robot at POINT BLANK RANGE
with your devastator,and you need to shoot down a blimp with the devastator. At kyzil
plateu, veldin,( not the first level, the one where you go down there to fight drek, and
that is the last level) you need to kill 10 commandos with your wrench. that is all i no
but at gamespy.com you can get a strategy guide with secrets like all the skill points.
just type in ratchet and clank and click search and then choose the right game and system.
then scroll down and click stratedgy guide

hi hot shot