User blog comment:Pedro9basket/Battlefield 3 Reviews released/@comment-4081799-20111026160124

The manner in which you can fail while attempting the campaign did quite strike me as a little... brutal.

By about Operation Guillotine, I began to notice that, even on Normal difficulty, I could die very quickly to enemies whose location was not apparent until after they started shooting at me. Killing people is not too difficult, but finding them before they hose you down with astonishing precision is the greater challenge.