Arma 3. It's a military simulator. However it's made so you can mod it, and play all different kind of games inside Arma 3. My favourite is Altis Life. It's a role play mod, and you have civilians, cops, and rebels. Everyone is a real player except for the people you buy and sell things from. All the cops are real, civilians are real, and rebels are real. Basically the goal is to make money, you can do that by selling drugs, or doing legal things like mining copper, iron, diamonds ect. If you're a cop your goal is to find rebels or wanted criminals, but you need probable cause first before you can arrest someone. i.e. having an illegal weapon, being in an illegal area, seen using drugs, ect. And all players have names above their head but since it's a role play mod you pretend that you don't know their actual name. There is much more things to do but that is just basically what the mod is.