“With great power comes great irresponsibility” should be the motto of Saints Row IV, which escalates mischief-making to ridiculous levels in a series of increasingly over the top missions. The central mechanics should be familiar to anyone who has invested even a few minutes in a “sandbox” title: you are presented with a fully accessible city packed with challenges such as timed races, shooting galleries and escort quests. However, you will more likely spend your time running riot by blowing stuff up, gesticulating rudely at pedestrians and generally acting the jackass. Saints Row IV stretches this idea like silly putty…