Um... Murder...?
Killing people who get in their way, propaganda, putting harsh laws on people who try to escape the laws already set in place. Pretty much anything harsh and unreasonable. Its a game based on fear.
It seems that you have missed the given options for this question, but anyway, here is the answer. The conditions wherein the government should be changed is when the people become dissatisfied with it and that, <span>when it fails to grant people their rights. The government's service is always for the people. Hope this is the answer that you are looking for.</span>