Kill fun,Kill some more,some more fun,Kill a lot more,a lot more fun.

pretty impressive how badly it aged
like not for any content but straight up how it plays: a lot of times the randomization of the levels leaves later on leaves you with no options to handle the mission more stealthly, and with escape options very limited there is no way to complete the level without having options to mass decimate the crowds and not get busted immidately
the second improves on this stuff immensively while having a bunch of problems itself, but you are much better going for that one instead