Whether it's cooperative or competitive, what are your ideas for implementing multiplayer?
One thought is to weigh the options of preventing people who may rent the game from trying out the multiplayer. I think Ubisoft has a Pass program like EA's.
If someone cannot try out the multiplayer when they rent the game, they may still not have all the information they'd like to make a decision.
In terms of Competitive MP:
1) Considering that most open world games in cities are fairly large, Rockstar had used little dots so anyone could see where anyone else is.In a game like Watch Dogs, I feel a map system would be an excellent vehicle for some hacking my players to either hide their location or root out other players.
In addition, the use of traffic cameras in the city to alert you when they's a competing player or maybe just what happens in that camera's field of view (FoV). So the player is alerted that the enemy is coming from one direction vs, another, but then those camers could be hacked as well.
Kinda makes me think of tower defense, but I'm too unfamiliar with that setup to expand on it.
2) I think there would need to be some kind of effort or way the player can work themselves up to the point they could alert the police to go after another player or something. Maybe hacked cameras will alert police to stolen cars (cause all the cars a player's going to get are stolen, right?).
1) The other players who are not the main character do not have to be near player 1's mission. So if player 1 has met the guy at the bar who gave him a gun, the other players will not get warped to player 1's location. (Maybe an option?)
2) If the other players are separate from player one (as it was guessed by the end of the E3 demo), then whatever intel they gather could potentially be used to support or hinder the other player. Maybe give them a choice of sharing data by linking hacked cameras to player 1's system.
3) If player one is trying to hack a system that would normally take a longer period of time, a secondary player could potentially join the hacking attempt to speed it up, or slow it down by fighting off the other player's attempts.
It's going to hard for Montreal to balance how players interact given that hacking is the method of interaction through most of the world. The devs have stated they were going for a more non-traditional multiplayer setup.