Hint :
Hint: Level 8: Break into heavily protected enemy base:
Have you ever noticed how Oasis will come up with four enemies in the middle of the top main base if you do a Special Search, but your sensors cannot find anything? Go around to the left side of the base until you see a steel wall. Keep blasting at the wall until it catches fire and collapses. Go in, and a conveyor belt will take you down to four power generators which you can destroy.