I don't "get" the 1vs1 hacking.
Are you supposed to imitate the back door thing and run away? Why was the other players model some random dude but I'm still Aidan? I was half out of it while playing yesterday.
First you follow the player. Then establish a link. You get 5 minutes or so to do this.
You then get 60 seconds to initiate the back door and start the data download.
From what I gather: the player will be informed you're there as soon as you invade. When you establish the link, a circle will appear on the map alerting the player to the area you're in.
When you initiate the back door, this area shrinks, and continues to shrink incrementally as your download reaches certain percentages.
You need to stay within the radius on the map and evade the opponent until you've completed the download. If you're spotted, you need to escape from the area. If you're being invaded, you need to scan the area with your phone, identify the hacker, and try to kill him/her before they escape.
Whenever you play MP, you will always be Aiden. Your opponent will always be a random NPC skin.
Some tips:
If you park in a car, park it just like they're parked in game and hide. This tactic is risky, the player needs to be close to scan you, and it takes time to start the engine, so they have a good chance of either grabbing you from the car or hitting it with a heavy weapon.
The best tactic I've found if you want to stay in a car is to drive slowly around inside the radius, following the traffic and stopping at lights just like an NPC.
If you think about to get caught waiting at traffic lights, hack the light and cause a crash, use the distraction to drive by and usually your opponent will miss you.
If you reach the edge if the radius, drive outside it and turn back in. Take your time. You have 15 seconds or so to resume.
Dumpsters are OP. If you find one, jump in and stealth against the wall. 9/10 you can sit there for and easy 100%
If you're bing invaded and you see dumpsters, check them.
If you can get to higher ground, do it. People tend not to look up.
Don't stand in crowds. They're usually the first things to be checked. If you like to stay on foot, the best way to stay hidden is to follow your opponent from a distance. If they suddenly turn toward you, walk slowly away from them and try to move out of their line of sight so you can run to a new location. remember, you appear as an NPC, so use this to your advantage to slip away.
And get the grenade launcher ASAP. When you're invaded, and you spot a player, if they get in a car this little guy will be good to you.
And have fun! Invading is really great. You never know how the player will react, it can make for some really heart pounding encounters.