I didn't play the game myself, but I watched a few minutes of the multiplayer demo being done live by 2 employees, one playing the game and the other explaining what was going on (see pics below). An interesting thing they guy explained was the use of small colored diamonds in the HUD next to your name and your target's name. The more diamonds next to your name = the more opponents there are coming after you. Similarly, the more diamonds next to your targets's name, the more people there are going after him/her. So if there are several diamond's next to the name of your target, you'll need to hurry before someone else beats you to it.