The lights are on
The multiplayer component of Brotherhood is a wondrously complex game of cat-and-mouse, and new players can quickly become confused, prey for those towering level 50's. But fear not! Some basic tips will ensure you're assassinating the populace of Renaissance Italy with speed an style in no time!
1) Quality Over Quantity
This is THE MOST IMPORANT tip, and the one which many players never learn. A basic, dirty kill is worth 100 points. Being discreet and running a bit before killing your target increases this by 50%. Being totally incognito makes the kill four times as valuable. Killing from a hiding spot tacks on 200 extra points - the equivalent of two messy kills. The lesson to take away here is that sprinting around and starting chases all the time is never a good idea, even if you get 15 kills or so in a match - your score will remain in the 1500-3000 range. I've gotten 2200-point kills before (granted, with the x2 loss streak), single-handedly bringing me from 8th to 1st. However, don't take this to the extreme. If you must, get a relatively cheap kill. You should almost never begin chases, though.
2) Where Not To Go: The Rooftops (Mostly)
Want a giant "KILL ME" sign? Well, you can't have one, but this is the next best thing. In addition to being visible to anyone, your pursuer is notified that you are above them. Combine with being the only person there, and you're dead, unless you intentionally ambush them with a Smoke Bomb and stun. Not only that, but it's exceptionally hard to identify and tail your target from the roof, and the Incognito bonus is usually out of the question, as is Hidden. So, avoid...
3) Know the Terrain
Know where to run if you need to, where your target is by the compass alone, and where you can cut off said target, preferably from a blend spot for the extra 200 points. Keep an eye out for glowing chase breakers that cut off pursuers if you run through them - they've saved me more times than I can count.
4) Keep Your Cool - Play Defensive
If you've paid attention to the point tallies for each player at the end of any game, you'll know that you can earn just as many points defensively as offensively. Indeed, if you manage to get to third place or higher in Wanted mode, you'll need to play defensively to be able to do anything. This works for several reasons:
5) What to Use and What to Avoid - Abilities
Most abilities have their place, and shine in certain situations. Nonetheless, there are ones which really stick out, and others which... don't,
6) What to Use and What to Avoid - Perks
Perks are a lot like abilities - most have their place, but some are garbage.
7) What to Use and What to Avoid: Streaks
Streaks all have their place - none are useless, but I definitely have preference for some.
7) The Line of Sight Trick
Is there a pesky morphed group which contains your target? Do you not have an ability equipped to dispose of him with certainty? No problem! Simply walk around a corner and pay very close attention to when the compass stops flashing - that indicates you went out of line of sight of your target. Using this, you can pinpoint your target in a group... I won't say always, because some groups are very clustered... but a good deal of the time. A word of caution - don't make it obvious that you're strafing the wall. Your target can see you, and more than likely will deduce what you're trying to do.
8) Mimic the AI
Pay attention to how the AI acts. Usually, simply moving into a blend group causes you to mimic them, complete with walking patterns, but if you aren't in one, stay on the path which most AI civilians walk along. Note that when the civilians wish to enter a blend group, they pause, then turn and walk into it. This may not seem like much, and in the lower rankings it really isn't, but you need to master your stealth higher up. Try throwing in a few pauses and turn-arounds - sometimes the AI does that too. Don't just walk without pausing or turning though - that's a great way to stick out to a very discerning player. Try to power-walk (that is, holding x in low profile) sparingly, as well.
9) A Game of Wits
Even with all these tips, Brotherhood is largely a psychological game. What I mean is that what your pursuer or target thinks is everything. Say you're on a rooftop (I know I said try to avoid them, but, hey, it will happen) and a suspicious player is power-walking towards you. For one thing, you can bet your ass he's your pursuer, but I digress. Say, instead of running, you want to ambush him and smoke or charge him. Facing your character to or away from him can make all the difference. You can always face your camera towards him, but pretend your character is looking at something else. If you turn right at him, there's a good chance he knows that you know he's trying to kill you, and if he manages to dodge that smoke or charge, you're screwed. Turn away from him, and he might still be cautious, but the chances are lower. For added effect try running along the edge of a building or something like you're looking for a target - anything to throw him off. That's just one example, though.
Even if you're completely incognito, not power-walking, and sticking to the AI's path, a single character walking around is suspicious. Stick to a moving blend group that's heading towards your target - they won't see what's coming for them, and you get a Hidden Bonus.
Pretty much, ask yourself "What would fool me?", then do whatever that is to other players and don't fall for it yourself. Think outside the box.
Well, I'm not done with this, but I figure that's enough for now. Enjoy!