Either you can be a ghost, sneaking through the levels unseen through secret passageways, taking enemies down with non-lethal force, or you can be a full-on Rambo, upgrading your exoskeleton with armor and the ability to shoot explosives in every direction as you unload automatic weapons into any nearby guard.
But with improved protection from equipment such as ski body armor, is there a danger of being lulled into a false sense of security and to attempt something above your ability level?