Sorry, I thought you said CAREER 4. I noticed that the AI sucked in the challenges... A LOT. It needs more advanced controls, like a target designator, and a engine stopper. And possibly hide behind (follow doesn't always work as it should).
Massive Tip/Semi-guide/Possible arsenal spoiler.
Wammy this game is EASY just buy the BEST parts. Only the best, mmk? How I won the *Spoiler* and *spoiler*. Always use the best gun, unless it's got 0-50 range. Those are useless. And don't buy the distribuitons. Last tip, check dpm- if the damage change is less than 1000, don't bother.