Here’s what I am thinking.

-Police

Fairly self explanatory. They walk around with guns and enforce basic laws. They would need to be “hired”.

-Illegal Activity

The fun part. Here’s the thing. THIS ISN’T GOING TO BE LIKE GTA. However, it would be cool if there where at least some shady elements. This doesn’t mean going around killing everyone, doing drugs or basically being DarkRP. That’s not what I’m after here. All I’m after is maybe some possible criminal activity. This could be anything from organized crimes taking down companies (I’ll get to that later) to someone stealing things and maybe murder. This would add a new spin to the game. It would also be interesting if there were hits on people that where of high value, for example a wealthy business owner. It would also be good though if when you got caught you lost everything/went to jail. This leads to my next part.

-User-based Jury System

Now this is something a little more elaborate. This would be almost like a separate gamemode. At this point, the person in question would have been brought in to the jury. People will join just like a new game is starting however if there isn’t enough people they will remain in jail (or die after about a day) until there is enough people to form a jury. At this point, people would need to use security camera footage, forensic evidence, eye witness, and recordings to determine if the person did the crime or not. This, again, would be an interesting spin. The people would then vote whether the person is guilty or not. Obviously, depending on the crime, the punishment could be scaled corrosponding to the seriousness of the crime.

-A Better Death System (Excluding Pressing K)

Here is an idea that makes things a little more interesting. If you were killed, all your money goes away. Though your apartment is still there, your money is taken by whoever killed you and your business is put up for sale. Fairly simple but would obviously require changing the game.

-Guns

Due to the wackiness of TU, this needs to be crazy and wacky. Sure you can have your normal pistols but killing someone with an squid that shoots ink would be fitting. Obviously that’s just an example but this could get very wild.

-Secret Agents

Now this is something cool. Government run undercover agents could be part of the police system but get intel on potential criminals, get intel on organized crime groups (see companies), take down spies that are unofficial and keep the place safe from a nuclear attack. Basically a miniature cold war happening in the background. Only those who want to be a spy are a spy because the death system would be applied here.

-Companies/Real Estate

Now for the big one, companies. Here’s what I’m thinking. For all the floors on the tower, there should be 10 available rooms for companies. These player owned businesses will cost a set amount plus addition fees. These businesses can be anything from a rent-able room to something more sophisticated like stocks. These stocks would be based off the success of other companies. This could also be a good way to implement steam workshop. Things approved by people in a “patent office” could be sold as goods. Also, there could be writers for the TowerNet (something like the internet). There could also be a shady side to this. There could be illegal things going on in the buildings too, like money laundering, stealing money from employees, organized crime etc. You could also put a hit on a competitor businesses CEO to try and be the only option. This would also keep everything flowing and could stop monopolies from happening. Finally, the real estate. Once the tower is full of companies, basically a fight begins to get your company out there. Lets say you want to have a ISP company. There is one big one and there is no space. They could buy out the area or try and shut down the bushiness.

Note: This is extremely hard to implement (specifically the companies one). If you can do it, great. As someone who has worked with UE4, I think you could do it but not easily.