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Sony PSP - Fired Up cheats

Destroy the big tank at the end:
Go up to higher levels by using any of the ramps. There are four 
shiled generators. Hide behind one of them. The big tank will shoot a 
homing rocket at you, but you do not move. The tank will swich his 
weapon and start fire lasers at you. The lasers can go through the 
walls. Reverse so that you are not hit and destroy the shield generator. 
Move to the next one after the lasers have finished and repeat the process. 
If you get hit and takes lots of damage, go to the garage and change 
vehicles. You can do this only one vehicle. After all the shields are down, 
the tank is ready to be destroyed. If you go to close to the tank, he will 
start shooting grenades at you. The most effective weapon is the palsma. 
Use your plasma weapon to destroy the tank. When you say "Preparing homing 
rockets" run away, then attack again.