I think it would be cool to need to interact with other players in the game (without killing them), to achieve certain things. One way it could be done is with weight, volume and fatigue, e.g. when looting with a group you can share the load and therefore move faster and travel further before you need a rest. I hope they implement something like that, and this leads me to what I'm really interested in. Let's assume we're getting building and vehicles in this game. You could have certain actions that require two or more players. E.g. when constructing buildings or flipping over large upside-down vehicles. In the Epoch mod you build walls and happily swing them around by yourself with no problem, but irl they would be very heavy. What if you needed two players to move one of them? This way, to make larger constructions than say a shack or tent, you would need help from other players. I imagine having to move slowly with them as well, making you vulnerable while building and also making every additional person you can find to help a real asset. If you like playing as a good guy, you could search for trustworthy people and make friends, or literally pay people peanuts to work for you. If you like playing as a bad guy, you could capture Bambi slaves to do your building/heavy lifting.. and maybe heroes would try to rescue them from you... I know, I'm a dork..