Driver 2 had atleast one nasty difficulty spike in every city in undercover mode, but one was notoriously crazy:
Chase the gunman
Timer that changed time everytime you restarted the the mission (ranging from 1:45 to 2:45) enemy vehicle had solid granit car so it could ram through everything, ramming into it knocks you back and to make matters worse: lots of lag if you managed to reach the canyon parts of the chase. It's still the toughest mission I've ever completed in my book and never going to do it again.
Timer that changed time everytime you restarted the the mission (ranging from 1:45 to 2:45) enemy vehicle had solid granit car so it could ram through everything, ramming into it knocks you back and to make matters worse: lots of lag if you managed to reach the canyon parts of the chase. It's still the toughest mission I've ever completed in my book and never going to do it again.