Ratchet & Clank: Up Your Arsenal Tips

easy upgrade from mega to omega
ok first you need to be on challenge mode. then buy the mega versions of the weapons you want to get omegafied. then go to either thyrannosis, blackwater city, metropolis, or others that have drop ship. next, go to the drop ship in the level, then select a challenge that requires you to just walk on foot and shoot with your weapons. okay so then when you get there take out any mega weapon. start shooting at your enemies and dont stop. you will seem to upgrade rapidly. why? because in challenge mode, enemies get tougher and harder.

tip: it's good to have the PDA because this may use up ammo fast!