Trouble in terrorist town (known as TTT) is a gametype in garrys mod. But this one is probably the most played of all. What you do is a group of people are traitors and the rest are innocent and about 3 detectives try and figure out whos the traitor. If your a traitor you have to be killing all the detectives and the innocent  Incognito or else the innocent will hunt you down and kill you if you are killed you are out for the round. the traitors win if they kill all innocent without dieing. the Innocent wins if all the traitors are dead. There is a series of traitor only weapons which are bought with points. when your team wins the round you will get points. the traitors share mostly the same weapons but their slightly different. Good luck traitors >:D