Jak II Tips

easy upgrades
when u have heaps of metal head things that u get when u beat them go to the oracle and exchange them to get new abilities.

Edit: Correction by Neoseeker member "Skelator" :
Must be in Hero Mode to work properly. All Metal Heads only produce ONE gem after being killed. Metal Heads that re-appear after being killed do not produce gems. Some Metal Head creatures do not produce ANY gems. To find out if the Metal Head creature will produce a gem, the gem on it's forehead will appear to have a yellow "halo" around it. Playing in Hero Mode allows Metal Heads to regenerate their stolen gem making it easier to collect 200 at a time. (No cheat device used) Best place to get LOTS of gems: Mountain Temple.